James Webb Space Telescope 🔭

[reef sequoia]

Lol Wayland. I can't even get Wayland to load at all

And not even the guys on the Arch forums could fix my stuttering problem, so I'm probably gonna jump to an AMD card. I'm so tired of stuttering and tearing.

[wispy sun]

https://blogs.nasa.gov/webb/2022/01/21/webbs-journey-to-l2-is-nearly-complete/

[grave carbon]

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/01/21/webbs-journey-to-l2-is-nearly-complete/

[brave coral]

fat fingers the burn

[modest dune]

||https://giphy.com/gifs/disney-pixar-disneypixar-2uFLqNEmuOW08||

[thorn musk]

as long as they dont accidentally trigger a stage like people tend to do in KSP

[wispy sun]

The blog bot is down again

Kernel panic on boot

[old charm]

Reddit on how they park Webb at the right spot:

So it's a game of space-curling

[safe bronze]

Pretty accurate, lol

[wispy sun]

except it's mathematical space curling :)

[thorn musk]

thats a pretty good analogy yeah, since you can only add speed

[worldly harness]

100km

just a couple minutes

[modest dune]

for posterity

[last shadow]

link o that website?

[noble quarry]

https://jwst.nasa.gov/content/webbLaunch/whereIsWebb.html

41 km and counting

[modest dune]

pinned in here for weeks :D

[last shadow]

oh lol

i didnt even see it thanks

[noble quarry]

10 km!!

[last shadow]

4 miles!

[noble quarry]

5km!!!!

[last shadow]

its there

[modest dune]

I think the site just got effectively DDOSed

[worldly harness]

lul

[noble quarry]

screenshotted right at 0 🙂

[wispy sun]

Batman?

[worldly harness]

yes

https://www.nasa.gov/nasasciencelive

will apparently be live in 42 minutes

[ornate marsh]

oh yeah, the hot side is moving at 54 c, gotta go fast

[safe bronze]

Watman

[brave coral]

cold side is going at -211c! its pulling the satellite apart!

[reef sequoia]

I'm giving 'er all she's got, cap'n!

[noble quarry]

so, we have good orbital insertion and no failed unfolding actions

Webb is knocking it out of the park so far

[brave coral]

all according to plan

[wispy sun]

https://blogs.nasa.gov/webb/2022/01/24/orbital-insertion-burn-a-success-webb-arrives-at-l2/

[brave coral]

“Webb, welcome home!” said NASA Administrator Bill Nelson. “Congratulations to the team for all of their hard work ensuring Webb’s safe arrival at L2 today. We’re one step closer to uncovering the mysteries of the universe. And I can’t wait to see Webb’s first new views of the universe this summer!”
the most BORING statement ever

[noble quarry]

boring is good, very good

[wispy sun]

did anyone notice that the L2 insertion burn bar got a whole lot smaller?

[reef sequoia]

"Webb, welcome home! It's been a perilous journey. You may have lost a few screws along the way, and your heat shield is literally hanging on with beeswax and masking tape, but you made it. Congratulations!"

There, made it more exciting for ya. :P

[wispy sun]

hey, that's why there's multiple screws :p

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/01/24/orbital-insertion-burn-a-success-webb-arrives-at-l2/
2. https://blogs.nasa.gov/webb/2022/01/21/webbs-journey-to-l2-is-nearly-complete/
3. https://blogs.nasa.gov/webb/2022/01/19/webb-mirror-segment-deployments-complete/
4. https://blogs.nasa.gov/webb/2022/01/13/mirror-mirroron-its-way/
5. https://blogs.nasa.gov/webb/2022/01/12/webb-begins-its-months-long-mirror-alignment/
6. https://blogs.nasa.gov/webb/2022/01/10/following-the-next-steps-in-webbs-journey/
7. https://blogs.nasa.gov/webb/2022/01/08/primary-mirror-wings-deployed-all-major-deployments-complete/
8. https://blogs.nasa.gov/webb/2022/01/08/starboard-primary-mirror-wing-deployment-underway/
9. https://blogs.nasa.gov/webb/2022/01/07/first-of-two-primary-mirror-wings-unfolds/
10. https://blogs.nasa.gov/webb/2022/01/07/primary-mirror-deployment-has-begun/

[wispy sun]

there we go

migrated to a fresh arch install

I seem to be getting a bit familiar with systemd these days...

[ornate marsh]

oh wow, a lot of updates

oh, never mind, bot broke

[wispy sun]

quick! post everything we've written within the next two minutes or so to cause chaos!

[modest dune]

webb didn't have an ion engine, did it? I wonder why..

[ornate marsh]

it doesn't

it has 8 hydrazine thrusters to do course corrections

[safe bronze]

2008 technology probably :P

[ornate marsh]

that's part of it yeah

ion engines were experimental when the thruster design was locked in

[brave coral]

also, ion engines have low delta-v. and, webb's orbit is exponentially unstable so its important to have a big delta v buffer in case you miss an orbital correction, you'll need more and more delta v in order to correct

[modest dune]

mmh.. "behind" its time in some ways yeah

[ornate marsh]

maybe they figured they already have the hydrazine for the main engine, might as well reuse the same fuel for the thrusters too

[brave coral]

what i mean by that is if you get a little bit out of orbit, it doesnt take much to get you back in. ion engines could do that no problem. if you get a little more out of alignment, suddenly it takes a lot of thrust to stabilize. your ions are straining a lot. just a tiny bit more and you're doomed. you'll need more thrust than the ion engines can deliver to move back into orbit

i didnt know this beforehand, this is based on the 2nd answer here
https://space.stackexchange.com/questions/57255/why-doesnt-jwst-use-ion-thrusters

since there's a risk of slipping out of orbit, its safer to use high thrust engines

[safe bronze]

Delta-V is not the same as thrust though

[brave coral]

you're right. i should have delta-v/second

[safe bronze]

[noble quarry]

"acceleration"

[safe bronze]

I think that's called acceleration

[brave coral]

you're right. i should have said acceleration

[ornate marsh]

they have low delta-v but their Delta-v is fine

δv versus Δv

[carmine olive]

plus it's potentially refuelable anyway

or so I've heard

that would likely be an easy ™️ mission that, given the current projected lifespan of the project, could probably start development ten years from now

[ornate marsh]

if they start right now, JWST might still be near L2

[noble quarry]

maybe in a decade we can just send a Starship repair team

[brave coral]

where'd you hear that?

[carmine olive]

https://space.stackexchange.com/questions/38389/is-it-possible-to-refuel-the-james-webb-space-telescope

for a telescope for science funded through tax dollars it's a bit unfortunate we're left in the dark about if there or if there is not a refueling port

[brave coral]

neat!

[grave carbon]

Ppl make a big deal about the short service life of JWST but NASA uses the Scotty method of giving estimates. Always under-promise.

IIRC they said the launch was flawless so we can expect ~20 yrs of service instead of the originally very conservative estimate of 10

[ornate marsh]

It was given enough fuel for 10 years, so that's the minimum service life (barring unforseen circumstances), but NASA/ESA will use the telescope for as long as they physically can

[noble quarry]

I thought they were only going to guarantee 5 years (before launch)

[ornate marsh]

But since they ended up needing less fuel than anticipated to get to course correct to L2, they can reuse that for about 10 more years of stationkeeping (advantage of using hydrazine thrusters I guess)

Guarantee 5, plan for 10, act pleasantly surprised when you get 20

[noble quarry]

🙂

[brave coral]

lets not get too excited here, we still havent even got 1 year of operation out of it

[grave carbon]

The most nerve wracking part is done tho

[carmine olive]

no celebrating til we get pictures

[modest dune]

🍾

[brave coral]

i agree that the nerve wracking part is done. but i dont think we should be expecting 20 years out of it quite yet! i dont think nasa has said that they expect 20 years. i do know they said they might have 20 years of fuel, but that's a lot different than saying that they expect 20 years of operation.

remember, hubble had a mirror flaw that wasnt detected until they actually started taking pictures

they had to send out a (manned) repair mission, which is simply not possible for the jwst

[last shadow]

ill volunteer to fix it

[noble quarry]

fortunately, this time the mirror is segmented

[modest dune]

they did do a test of the optics on the ground though

[noble quarry]

also, that's not the sort of mistake one makes twice, lol

[last shadow]

also robots could potentially fix a mistake if they want to send out a small "low" budget mission with no return

[noble quarry]

there's probably a whole section of the testing procedure devoted to not "repeating Hubble"

[modest dune]

99 bugs on the wall, take one down, patch it around, 99000 bugs on the wall

[brave coral]

yes but there is a huge class of unknown potential failure modes out there

[noble quarry]

shouldn't that be 101376 bugs? 😛

potentially 101375 (if the original bug was actually fixed)

or maybe just 100352

[modest dune]

I'm sticking with enjoying cautious optimism, mindful of the fact that it could go wrong, but genuinely hopeful with recognition of it being utterly and blissfully out of my control

[ornate marsh]

because they tested in atmosphere?

(except they also tested in vacuum so that's not it)

[brave coral]

same! which is why i think the "expect 20 years" is far too optimistic!

[old charm]

Hope for 20, expect 2

[modest dune]

Calc said act pleasantly surprised and I can see how that sounds like expecting 20 so I see where you arr coming from now :P

And apparently my phone thinks I should speak like a pirate

[brave coral]

was talking about 86, who said we can expect 20 years

[modest dune]

Ahh

[last shadow]

You can see the telescope apparently

[old charm]

With another telescope

[safe bronze]

But how did they take that picture?

[old charm]

With another telescope

[wispy sun]

but I want a picture of the telescope that took a picture of the telescope

[noble quarry]

telescopes all the way down

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/01/27/the-webb-team-looks-back-on-successful-deployments/

[worldly harness]

https://www.virtualtelescope.eu/the-planevawe-17″-f6-8-4322939-mm-corrected-dall-kirkham-astrograph-paramount-me-stl-6303e/

click the tiny pic embed

[last shadow]

now i want a picture of the camera that took a picture of this telescope that took a picture of the other telescope

[worldly harness]

I knew this day would come

according to the EXIF data on the picture

[worldly harness]

https://www.dpreview.com/files/p/articles/3818725255/Images/A710_3q.jpeg

(apologies for the shitpostery, lets go back on topic)

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/01/31/following-webbs-arrival-at-l2-telescope-commissioning-set-to-begin/

[modest dune]

turning off heaters to begin a long cooldown process
Despite the lack of humidity and indeed an atmosphere as a whole, this still made me imagine Webb turning into one big snowflake, crystalizing outward

[calm flint]

"Don't lick the telescope"

[brave coral]

The heaters were necessary to keep critical optics warm to prevent the risk of water and ice condensation.

UH OH

you were right IC

[modest dune]

I mean sure, during the launch/setup :P

[frail atlas]

Is it Operational?

[modest dune]

^

[calm flint]

In 6 months, pehaps. Currently testing & calibrating.

[frail atlas]

Ooh nice

Also Nice Star Trek Ship Iron

Is it the USS Enterprise?

or USS Discovery

[modest dune]

I didn't search in a medium that would give me that info as conveniently as the gif itself

[frail atlas]

Ah ok

Then prob Enterprise

As its the Most Popular

[grave carbon]

It's the JJ Abrams Enterprise

From the new movies

[noble quarry]

you can always recognize the Discovery by the separated ring in the saucer section

[topaz gorge]

look at those eyes in that reflection

nasa scientist reptilian confirmed?

[brave coral]

WTF

that is SPOOKY

[safe bronze]

lol

Gotta love parabolic mirrors

[frail atlas]

In its newest model yes

[noble quarry]

ah fair enough

[pseudo comet]

(continuing the tangent a little)
I maintain that The Orville has a more complete grasp on the mantle of Start Trek then does Star Trek: Discovery

[ornate marsh]

The Orville got a lot better when it moved on from the Family Guy humor (the first couple episodes are rough)

the Neelix vs EMH episode was good though

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/03/photons-incoming-webb-team-begins-aligning-the-telescope/

[carmine olive]

very cool

[brave coral]

The images taken by Webb during this period will not be “pretty” images like the new views of the universe Webb will unveil later this summer. They strictly serve the purpose of preparing the telescope for science.
show us the images!

this is a very interesting article! they go into the mirror alignment process

[safe bronze]

Just take any random pic of the night sky, then blur it until it is a single color :P

[brave coral]

there are a few simulated images on what it might look like at each step

[wispy sun]

I just took time to read it

it's very interesting and informative

[autumn sierra]

It was Phlox.

Also how's the telescope going? Last I heard, better than planned and lots of fuel

To work together as a single mirror, the telescope’s 18 primary mirror segments need to match each other to a fraction of a wavelength of light – approximately 50 nanometers. uh

[grave carbon]

AFAIK still calibrating and shit

[ornate marsh]

Yep

[noble quarry]

that's not so bad, actually; you can buy off-the-shelf picomotors with ~30 nm position resolution

Webb's mirror actuators are probably good to 10-20 nm, I'd guess

hmm, NASA materials say the alignment will be good to 1/10000 of a human hair (so ~2.5 nm)

so the actuators are probably good to at least ~1 nm position resolution, which is definitely some fancy tech (which also has to work at cryogenic temperatures, of course)

[brave coral]

Each of the mirrors can be moved with incredibly fine precision, with adjustments as small as 10 nanometers

yeah

[noble quarry]

hmm, I guess overall alignment and mirror position resolution are slightly different things

[noble quarry]

I'll say that I win (with my estimate)! 😛

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/10/webb-is-chilling-out/

[wispy sun]

Check back tomorrow for an exciting update about progress in the first weeks of Webb’s mirror alignment!
👀

obligatory: haha we don't have to check back tomorrow because we have the bot

[brave coral]

oooo

Mysterious

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/11/photons-received-webb-sees-its-first-star-18-times/

[bold bronze]

Oops

[brave coral]

first picture! the same star 18 times

and a selfie!

looks cold

[last shadow]

Don’t lick it ur tongue will get stuck

[reef sequoia]

That's amazing

[frail atlas]

Prob would kill the cells on the tounge

[quaint plaza]

This is going by so much quicker than I thought

Also learned about the micro actuators on the adjustable mirrors and their use of compliant mechanisms :>

[quaint plaza]

Iz cool

[carmine olive]

https://news.rr.nihalnavath.com/news/NASA's James Webb Space Telescope faces irreversible damage to its infrared sensors-0a98cb8d

okay no I can't share that and feel good

it's a joke

[bold bronze]

Space debris? At L2? Also yeah the link gives it away, I've seen (and clicked on) the same joke thing before haha

[wispy sun]

be glad I'm very sleepy at the moment

[carmine olive]

yeah lol, though the alttext or image isn't encoded in the URL interestingly

[frail atlas]

You used Embed ?

Tell me how you did it plz :D

[reef sequoia]

I genuinely had a heart attack, you got me

[modest dune]

DS9 spoiler ||https://giphy.com/gifs/eXOVOJLkK6G7S||

[grave carbon]

LOL

My favorite episode 😛

[modest dune]

Okay, the way this does coarse vs. fine is super cool. . . https://www.youtube.com/watch?v=5MxH1sfJLBQ

[quaint plaza]

That’s what I was talking about @modest dune ;-;

[modest dune]

for sure!

I didn't look up what that meant at the time but now it's clear :)

[quaint plaza]

So I get that the fine side is the shaft moving a notch which slightly moves the compliant part and the coarse is a screw, but I don’t think I get how you move the coarse adjustment without it screwing with the fine adjustment

Or I guess that wouldn’t matter? I’m not sure I understand the fine adjustment enough

[modest dune]

fine and coarse are different resolutions of the same dimension, so you always need to adjust fine after doing coarse anyway

[brave coral]

cool video! an interesting comment on it from Robert Warden, who wrote the original paper designing the device:

I just wanted to say how impressed I am with your reverse engineering! Your graphics and description are very well done. Back then, we didn't have easy access to 3D printers, so I built the first model out of Legos, which is still on my desk! Wishing you all the best

LEGOS

[carmine olive]

what does "compliant" mean in that context?

[pseudo comet]

ooh, boy -- somebody gets to learn something cool
https://www.youtube.com/watch?v=97t7Xj_iBv0

[carmine olive]

into the queue it goes

[brave coral]

id think "the part that moves or bends in response to a force." google gives this definition for compliant:

PHYSICS•MEDICINE
having the property of compliance.
"the conversion of the gel to a much less compliant, rigid glass"

[carmine olive]

so it's bendy

[brave coral]

another use is lung compliance -- the amount that lungs expand due to pressure. highly compliant lungs are like a plastic bag. lungs that are not compliant are like strong rubber

[carmine olive]

and supposed to be bendy

[pseudo comet]

yep. utility through deformation (as in, changing shape) (though almost never designed as permanent deformation)

[carmine olive]

though this seems to be somewhat permanent

[brave coral]

anesthesiologist need to pay attention to lung compliance when applying .... uhhh that throat tube thing that breathes for you

[carmine olive]

idk how often they'll recallabrate

[brave coral]

intubation!

[carmine olive]

do the mirrors warp themselves?

also these hexapod platforms are cool asf

[pseudo comet]

well, think of a paper clip. it's compliant for the job it does (holding papers together -- it bends a little and then back to its normal shape). but destructive deformation can also happen, where it won't return to its original shape (such as making a hanger out of it). I haven't watched it yet, but the video about the JWST mechanisms should make pretty clear…

[carmine olive]

the video doesn't go into the warp control of the panel, just the linear actuators themselves

[pseudo comet]

being a combination of coarse and fine adjustment, I'd be pretty sure that the compliant adjustment wouldn't be permanent in the mechanical property sense

[carmine olive]

yeah, not actually permanent just very... infrequently moved

yeah apparently the curvature of the mirrors are adjustable

[noble quarry]

yep, don't want a hubble repeat (well, and it's also convenient depending on what's being imaged)

[carmine olive]

ty for compliant parts vid

very cool

i wanna build one of these hexapod things now lol

[reef sequoia]

They are one of today's lucky 10,000

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/17/webbs-fine-guidance-sensor-is-guiding/

[autumn sierra]

http://sariel.pl/2009/09/gears-tutorial/ Didn't even need the video to recognize the gears, spacers, etc lol

grr (bushings) https://i.ebayimg.com/images/g/dL4AAOSw5alfRnSH/s-l300.jpg

[autumn sierra]

Interesting, the coarse/fine coupling is actually two separate interlocking mechanisms. I wouldn't be surprised if the prototype was a bushing or two cut into shape.

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/18/webb-team-brings-18-dots-of-starlight-into-hexagonal-formation/

[noble quarry]

Enhance!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/24/to-find-the-first-galaxies-webb-pays-attention-to-detail-and-theory/

[brave coral]

i need photos! photos of galaxies!

[old charm]

Photos of Spider-Man!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/02/25/webb-mirror-alignment-continues-successfully/

[wispy sun]

Cool!

[wispy sun]

found a funny comment:

NASA: "Better or worse?"
Webb: "Better."
click
NASA: "Better or worse?"
Webb: "A little better, I think."
click
NASA: "How about now?"
Webb: "Ummm..."
NASA: "What is the farthest galaxy you can see?"

[glad mist]

Haha

That’s great

[noble quarry]

Webb: "I'm not seeing any galaxies."
NASA: ...
Webb: "I'm seeing before galaxies!"
NASA:

[modest dune]

wouldn't the only thing at that point be the CMB/CνB? :P

[old charm]

We don’t know for sure!

It’s actually a bit of a puzzle that we keep seeing galaxies earlier than expected

[noble quarry]

yes, that was the joke 😛 (also nice profile pic, lol)

[pseudo comet]

so long as it doesn't start finding turtles

[noble quarry]

I think that would qualify as beyond-Standard Model physics 😛

[modest dune]

"That point" was specified as before galaxies, and I've bugged geo a fair bit with the hints that early galaxies look too contemporary at high redshift haha

[old charm]

But what if there isn’t a “before galaxies”? :p

Eternal inflation

[modest dune]

But how--.. hrm, been a while since I read about the different inflation model factors

[old charm]

I just think it would be amusing for a giant wrench to be thrown into ΛCDM and the universe is actually more static with the illusion of change

[modest dune]

I wonder if an infinite universe with greater and greater time compression at earlier stages is distinguishable from eternal inflation

[frail atlas]

What's before galaxies

Is that older then previously seen galaxies

[modest dune]

https://upload.wikimedia.org/wikipedia/commons/6/6f/CMB_Timeline300_no_WMAP.jpg

As per the ΛCDM model^

All the "That's funny..." things I've seen have made me intensely curious about the possibility of the observations attributed to inflation, dark energy, and even much of dark matter being the result of time compression (the inverse of what GR says that all mass/energy causes: space compression / time dilation) -- which would allow things like the cosmic coincidence of the equivalence of matter's density and dark energy's density being equivalent at our point on the timeline to be an invariant under a different model

-> Webb might see galaxies that appear to be so far away that they should be close to the big bang and thus young / small, but are actually more developed and not so different from our own, due to the way time compression being higher earlier on would affect the effective distance light would cover as the universe expanded

And then as per Maxreader's point about eternal inflation, I don't know if observing this ^ would be distinguishable from that

[last shadow]

That makes my brain hurt lol

[noble quarry]

Webb should finally give us enough data to begin lopping off incorrect theories

[thorn musk]

zoo hypothesis turns out to be correct

the whole "everything expands faster than light-speed" thing? its like that to discourage building exploration vessels :P

[noble quarry]

joke's on them when humans stabilize our first wormhole 😛

[thorn musk]

theres no grandfather paradox if all wormholes are fixed relative to some absolute perspective

[noble quarry]

yes, just need that universal reference frame

[old charm]

"JWST indicates evidence of, beyond all belief, pixels in the deep CMB"

[thorn musk]

"this just in, a giant crab thing floating in space appears to be pointing what looks like a gigantic telescope at us"

[old charm]

"The telescope appears to be heating up, maybe their cooling systems are failing"

"Oh no--"

[thorn musk]

"its quite a nice shade of red and looks to- did it just write out thanks for the compliment?"

[modest dune]

..aren't crabs only red when cooked, just like lobsters?

[thorn musk]

its not like its in deep space

[modest dune]

... glances back up at #offtopic :P

[noble quarry]

makes sense that the universe runs on Rust 😛

[modest dune]

This channel does a pretty good job of going over the most accepted model(s) of the universe to date https://www.youtube.com/c/HistoryoftheUniverse/videos

[eternal oar]

hopefully, would be cool

a theory i'd love to see confirmed or denied are the primordial blackholes

but i dont think webb is designed to look for those

[frail atlas]

The Craziest thing about all this is that the fact the Universe may have been born several times and died over and over, and that life from those Universes (Which ours was born from) could have had life and possibly LOTS of life (Unlike ours, atleast from current knowledge)

Its also INSANE to think that we could be seeing a star and its planet who hosts intellegent life, but never will get to see them due to them not existing rn

[thorn musk]

we dont know ours is devoid of life

statistically speaking its not

we just havent found it yet

[frail atlas]

Yea

But i was reffering to Possibly so much life that if we were in those universes that we could see em next door

so to speak

And another thing is that if there is other intellegent life forms, they could be alot like us, Chemically and Biologically

[thorn musk]

we have one data point, unreasonable assumption

[frail atlas]

We are carbon based, they could also be carbon based

ye

We could also discover new Things, like maybe More about Black Holes, with James Webb

[calm flint]

Would be interesting to learn how a reborn universe deal with entropy.

[old charm]

Entropy is statistical, not a completely hard rule

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/03/03/checking-out-the-mechanisms-in-webbs-nirspec-instrument/

[bold bronze]

Surprised this hasn't been posted here yet https://www.youtube.com/watch?v=Pu97IiO_yDI

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/03/10/webb-will-use-spectroscopy-to-study-composition-of-distant-galaxies/

[worldly harness]

it's aligned!

https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully

[brave coral]

[last shadow]

i need to ask, @noble quarry why 🕸️ ?

[noble quarry]

"Webb" and 🕸️

mostly it's because we have no specific emoji for Webb

it also works on multiple levels: Webb has a segmented primary mirror that is kind of like a spider web, and it also is "catching" photons 🙂

[worldly harness]

it's so sensitive, they didn't even mean to catch all galaxies in the background

[last shadow]

ah ok cool lmao that flew over my head

[old charm]

Yeah that’s wild

[brave coral]

where does it say that?

[wispy sun]

caption on the aligned image

[brave coral]

caption says they caught galaxies, not that it happened on accident

i guess the way i interpreted pinga's thing was that they unexpectedly captured the galaxies

[wispy sun]

yeah not exactly

they just caught it as basically light pollution in space :p

[thorn musk]

you know youve hit a new level when a telescope takes a selfie

but also, woo

[modest dune]

[worldly harness]

they got photobombed by galaxies

as in, it was there, even without focusing on them, which is impressive

[brave coral]

in general you just focus on infinity and you're good

[brave coral]

claim a galaxy. i like the S looking one near the top left

[last shadow]

I claim the one with earth in it, now pay me taxes

[brave coral]

D:

[eternal oar]

Dude the JW deep view is gonna be wild

[thorn musk]

not pictured: humanity

so uh gl claiming that one

[last shadow]

https://esahubble.org/images/archive/top100/ really cool images, cant wait to see what this new one will bring us!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/03/17/webb-begins-multi-instrument-alignment/

[noble quarry]

oh no, it got archived!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/03/24/webb-continues-multi-instrument-alignment/

[wispy sun]

permissions got messed up on a file

[modest dune]

it's so cool how the optics shift gradually and they have to solve all that math to do the alignment iteratively... really shows how differential equations become relevant, and why I should've studied the physics class dependent on them rather than bulldozing into the abstract theory without clear purpose and dedication

[brave coral]

https://www.nasa.gov/feature/goddard/2022/record-broken-hubble-spots-farthest-star-ever-seen

the only reason it was visible was because gravitational lensing zoomed it in

[grave carbon]

Ooh

Can't wait to see headlines like this with "JWST" in them

[brave coral]

they do say

Astronomers expect that Earendel will remain highly magnified for years to come. It will be observed by NASA’s James Webb Space Telescope. Webb’s high sensitivity to infrared light is needed to learn more about Earendel, because its light is stretched (redshifted) to longer infrared wavelengths due to the universe’s expansion.

“With Webb we expect to confirm Earendel is indeed a star, as well as measure its brightness and temperature,” Coe said. These details will narrow down its type and stage in the stellar lifecycle. "We also expect to find the Sunrise Arc galaxy is lacking in heavy elements that form in subsequent generations of stars. This would suggest Earendel is a rare, massive metal-poor star,” Coe said.

[grave carbon]

Nice

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/01/webb-completes-first-multi-instrument-alignment/
2. https://blogs.nasa.gov/webb/2022/03/24/webb-continues-multi-instrument-alignment/
3. https://blogs.nasa.gov/webb/2022/03/17/webb-begins-multi-instrument-alignment/
4. https://blogs.nasa.gov/webb/2022/03/10/webb-will-use-spectroscopy-to-study-composition-of-distant-galaxies/
5. https://blogs.nasa.gov/webb/2022/03/03/checking-out-the-mechanisms-in-webbs-nirspec-instrument/
6. https://blogs.nasa.gov/webb/2022/02/25/webb-mirror-alignment-continues-successfully/
7. https://blogs.nasa.gov/webb/2022/02/24/to-find-the-first-galaxies-webb-pays-attention-to-detail-and-theory/
8. https://blogs.nasa.gov/webb/2022/02/18/webb-team-brings-18-dots-of-starlight-into-hexagonal-formation/
9. https://blogs.nasa.gov/webb/2022/02/17/webbs-fine-guidance-sensor-is-guiding/
10. https://blogs.nasa.gov/webb/2022/02/11/photons-received-webb-sees-its-first-star-18-times/

[wispy sun]

(I ran it manually from my personal computer with an out-of-date sent links list)

[eternal oar]

(1021,400)

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/01/webb-completes-first-multi-instrument-alignment/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/06/webbs-mid-infrared-instrument-cooldown-continues/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/07/webbs-cool-view-on-how-stars-planets-form/

[bold bronze]

@quaint plaza

[quaint plaza]

oop sorry

[worldly harness]

[bold bronze]

Sorry for the accidental ping-a

[quaint plaza]

you're fine

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/07/webbs-cool-view-on-how-stars-planets-form/
2. https://blogs.nasa.gov/webb/2022/04/06/webbs-mid-infrared-instrument-cooldown-continues/
3. https://blogs.nasa.gov/webb/2022/04/01/webb-completes-first-multi-instrument-alignment/
4. https://blogs.nasa.gov/webb/2022/03/24/webb-continues-multi-instrument-alignment/
5. https://blogs.nasa.gov/webb/2022/03/17/webb-begins-multi-instrument-alignment/
6. https://blogs.nasa.gov/webb/2022/03/10/webb-will-use-spectroscopy-to-study-composition-of-distant-galaxies/
7. https://blogs.nasa.gov/webb/2022/03/03/checking-out-the-mechanisms-in-webbs-nirspec-instrument/
8. https://blogs.nasa.gov/webb/2022/02/25/webb-mirror-alignment-continues-successfully/
9. https://blogs.nasa.gov/webb/2022/02/24/to-find-the-first-galaxies-webb-pays-attention-to-detail-and-theory/
10. https://blogs.nasa.gov/webb/2022/02/18/webb-team-brings-18-dots-of-starlight-into-hexagonal-formation/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/14/webb-will-study-formation-composition-clouds-of-distant-worlds/

[wispy sun]

https://www.nasa.gov/feature/jpl/webb-telescope-s-coldest-instrument-reaches-operating-temperature

[brave coral]

we cold now

[modest dune]

this gave me shivers... why did this give me shivers

[brave coral]

hehe

[noble quarry]

webb is now officially chilling in space

[pseudo comet]

too cool for the rest of us

[carmine olive]

the cooler performance is even better than expected.”

nasa moment

[wispy sun]

"we had some slightly conservative estimates"

Last week, the team passed a particularly challenging milestone called the “pinch point,” when the instrument goes from ridiculously cold to extremely ridiculously cold

[noble quarry]

classic NASA

[bold bronze]

They know how to manage expectations and I love it

[frail atlas]

Did it find anything yet?

[noble quarry]

commisioning is still underway; no scientific results are expected before the summer

[frail atlas]

Ahh ok :(

[noble quarry]

but! it's going really well so far, so we might well have some neat preliminary images before then

[wispy sun]

https://www.nasa.gov/sites/default/files/thumbnails/image/telescope_alignment_evaluation_image_labeled.png

@frail atlas

each one of those blobs in the background are galaxies btw

[frail atlas]

Wow

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/21/is-webb-at-its-final-temperature/

[brave coral]

Is Webb at its final temperature? The answer is: almost!
chilly cool

[bold bronze]

Extremely cool 5.2 kelvins
Quantum computers: Am I a joke to you?

[brave coral]

During commissioning, Webb is currently spending most of its time pointed at the ecliptic poles, which is a comparatively hot attitude. During science operations, starting this summer, the telescope will have a much more even distribution of pointings over the sky. The average thermal input to the warmest mirror segments is expected to go down a bit, and the mirrors will cool a bit more.
even cooler

[wispy sun]

how... cool

[grave carbon]

I wonder when "this summer" we will start seeing full-resolution pics

[modest dune]

strange, this keeps hiding despite not being archived

[wispy sun]

yeah

I guess it's an old thread now or something?

or maybe after some period of no interaction with the thread it hides?

[grave carbon]

Idk threads are super wonky sometimes

[bold bronze]

Yeah I got a thread in another server that should get auto archived after 30 days or whatever someone manually does it, but it just reappears a bit after

So everyone's just had to leave it and now it's permanently an "active" thread when you hover over the channel lol

Last someone spoke in there was like 3 months ago lol

[frail atlas]

Maybe have a bot chat in here once/day

To keep it open

[wispy sun]

webbhook should theoretically post once a week or so

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/28/nasas-webb-in-full-focus-ready-for-instrument-commissioning/

[brave coral]

awesome!

the team held a set of key decision meetings and unanimously agreed that Webb is ready to move forward into its next and final series of preparations
i always wonder about these "unanimous" meetings. i know that at the federal reserve, for example, not having the a decision without unanimous agreement can worry people. so they'll frequently have an informal meeting where the decision is made with possible dissent, and then in the actual meeting "unanimously" agree to the decision.

in an engineering context, it seems likely that you dont have the formal meeting at all until you get the level of agreement you want.

(not casting doubt on the decision, just these types of politics are interesting to me)

[noble quarry]

I suspect it's more that not everyone had all the information, so once it was all presented together, everyone looked it over and pronounced themselves satisfied that everything was in order and they could proceed to the next phase

[brave coral]

we also got this great image from webb. some of these are almost terrifying in the number of stars and their density, reminiscent of Olbers' paradox
https://blogs.nasa.gov/webb/wp-content/uploads/sites/326/2022/04/webb_img_sharpness_details_v2.png

im a big fan of the MIRI image (Mid-Infrared Instrument)

these are images of the Large Magellanic Cloud, and until we get the first "official" image from webb, im still hoping that my prediction of horsehead nebula will be the first (real) picture

[modest dune]

I see your bet and raise you the Eagle nebula

(I know, you expressed a hope rather than a bet but mine isn't actually a hope per se)

[brave coral]

ohhh another good one!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/04/29/the-hot-and-cold-of-webb/

[modest dune]

geo, do you have notifications on in here? haha

[noble quarry]

nope, I just see the title go bold

[modest dune]

I keep reading these blog posts with the Homeworld narrator's voice in my mind ever since I thought of that "Mothership scaffold alignment confirmed" comparison

[noble quarry]

lol

that first paragraph works very well for that sort of thing

[modest dune]

Our task is to analyze all sensor data and generate mission objectives. Before the hyperdrive test, several trials must be completed. Test construction by building the primary research ship. Test resource processing by harvesting the asteroids provided nearby.

The thermal stability exercise will measure these changes by moving between the extremes of Webb’s field of view, from the hot to the cold attitude, spending multiple days in the cold attitude, then slewing back to the hot attitude. During this time, the Webb team will measure the thermal stability, pointing performance and optical wavefront drift. In addition to measuring the performance of the observatory, the team will also check the thermal modeling used to predict observatory behavior.

[pseudo comet]

the diction is clearly different, but I can hear it!

[wispy sun]

thought: this is basically the exemplification of "trust the data"

[modest dune]

"the" ? 🤔

I'm not sure what the agenda of that phrase is in its entirety per se, either

[wispy sun]

less pithily, the engineers don't have any visual input for the primary functions and so need to rely on an array of sensors to come to conclusions

[autumn sierra]

https://www.youtube.com/watch?v=UAx-D0GCvnI HYPE

https://science.slashdot.org/story/22/04/30/0147211/webb-telescope-captures-five-different-dazzling-views-of-a-nearby-galaxy

https://twitter.com/AndrasGaspar/status/1520184730985148418

Andras Gaspar 🌻🇺🇦 (@AndrasGaspar)

Thank you to @gbrammer for pointing out that the Spitzer SAGE survey took IRAC images of this region! I completely missed this. Check out the evolution of Infrared Space Telescopes!

Likes

6194

Retweets

1487

Twitter · Apr 29, 2022, 11:34 PM

https://twitter.com/AndrasGaspar/status/1519818306634588161 Someone asked about why the stars have a weird ray-bleeding artifact

[carmine olive]

the resolution is better than the resolution on the jpeg shared

[autumn sierra]

Related to this, the author mentions the first image came after the second. It was from a more general-purpose telescope, so the sequence of images is a bit misleading (it's not a timeline)

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/02/nasas-gregory-robinson-named-finalist-for-service-to-america-medal/

[wispy sun]

the guy seems slightly qualified

[bold bronze]

Bloody hell

Prior to leading Webb, Robinson served as the deputy associate administrator for programs in NASA’s Science Mission Directorate. He is a veteran executive, who previously served as deputy center director at NASA’s Glenn Research Center in Cleveland, NASA deputy chief engineer, and as the acting National Environmental Satellite, Data, and Information Service deputy assistant administrator at the National Oceanic and Atmospheric Administration.

[modest dune]

This may not be JWST, but whoa... https://www.nasa.gov/feature/goddard/from-a-million-miles-away-nasa-camera-shows-moon-crossing-face-of-earth

[bold bronze]

wow this looks like CGI

like, really bad CGI

[old charm]

the clouds aren't moving enough is the problem I think

the sun tracks across... probably 4 or so hours of time, no cloud motion but it seems like there should be

[brave coral]

obvious photoshop

[safe bronze]

Clouds don't move all that fast on a continental scale

[old charm]

It’s still about 4 hours though which is the thing

That’s enough that I imagine you should be able to see some changes purely from the day cycle

[brave coral]

Say the clouds in a huge hurricane move in a straight line at 100km/hr; over this 5-hour animation, that's 500 km movement which is just under 4% of the Earth's 12,742 km diameter. The Earth is about 550px in this image and 550 × .04 = 22 pixels maximum change.

[quaint plaza]

ooo

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/05/examining-the-heart-of-webb-the-final-phase-of-commissioning/

[brave coral]

We are now in the last two months of Webb’s commissioning before it is fully ready for its scientific mission.
HYPE

[grave carbon]

WEW

[modest dune]

https://www.youtube.com/watch?v=qJgdTf0l_OE

I forgot that seeing the orbits around the milky way's central black hole involved infrared

[brave coral]

but what about Earendel?

(this is a joke from the bloopers)

[autumn sierra]

It's a week late, but whoever wrote that, circumference should've been used.

[autumn sierra]

How can you have 7 planets closer than Mercury and have a stable orbit smh

[modest dune]

When you are looking at one side of a planet, it would be at most half the circumference--and even then, that would not account for nonlinearity from distance and perspective as much as constraining the problem to a short distance and thus being able to assume a near-flat trajectory on a flat surface with the same diameter as the earth

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/

[modest dune]

🎶 I can see clearly now, the rain has gone...

[brave coral]

i dont have the emoji to convey the feeling of seeing that huge improvement

this will have to do

[wispy sun]

I realized that the router was unplugged yesterday so I ran the script manually today, hence the late post

[noble quarry]

I can see clearly now the blur has gone
I can see all dark matter in my way
Gone are the dust clouds that had me blind

It's gonna be a bright (bright)
Bright (bright) infrared night

[dim sky]

James Webb Telescope is decent, have they taken any photos yet?

[noble quarry]

yes, but the science campaign is still waiting on additional thermal commissioning operations

(they're going to operate with the heatshield in different orientations and assess the response of the telescope and its instruments to the different heat fluxes)

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/12/seventeen-modes-to-discovery-webbs-final-commissioning-activities/

[wispy sun]

https://jwst.nasa.gov/content/webbLaunch/deploymentExplorer.html

I added a timeout to the systemd service

should be a tad more reliable now

[carmine olive]

you could also just like forward the rrs feed right

[wispy sun]

yeah

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/19/webb-nearly-set-to-explore-the-solar-system/

[carmine olive]

woho

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/26/webbs-quest-for-primeval-black-holes/

[modest dune]

defibrillator noises

[calm flint]

Dammit, you'll ruin the calibrations.
Those were delicate.

[wispy sun]

small beep

[pseudo comet]

July 12…
https://twitter.com/NASAWebb/status/1532018677805203456

NASA Webb Telescope (@NASAWebb)

🗓 July 12 — Save the date!

Count down with us to the big reveal of Webb’s first full-color images and spectroscopic data: https://t.co/hyZAYXvwfN

Want a hint on how Webb will #UnfoldTheUniverse? Read more: https://t.co/tv4SBRv9xI

Likes

10561

Retweets

2294

Twitter · Jun 1, 2022, 3:18 PM

[noble quarry]

when you see a human in front of the mirror, you realize it's actually pretty large

[pseudo comet]

true! though in that image we have no sense of parallax, so the gantry could be way closer of farther (though it's likely somewhere near directly centered on the front)…

[noble quarry]

6.5 m primary, so they're pretty close to it

[safe bronze]

Also you can see the reflection in the mirror

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/05/26/webbs-quest-for-primeval-black-holes/
2. https://blogs.nasa.gov/webb/2022/05/19/webb-nearly-set-to-explore-the-solar-system/
3. https://blogs.nasa.gov/webb/2022/05/12/seventeen-modes-to-discovery-webbs-final-commissioning-activities/
4. https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/
5. https://blogs.nasa.gov/webb/2022/05/05/examining-the-heart-of-webb-the-final-phase-of-commissioning/
6. https://blogs.nasa.gov/webb/2022/05/02/nasas-gregory-robinson-named-finalist-for-service-to-america-medal/
7. https://blogs.nasa.gov/webb/2022/04/29/the-hot-and-cold-of-webb/
8. https://blogs.nasa.gov/webb/2022/04/28/nasas-webb-in-full-focus-ready-for-instrument-commissioning/
9. https://blogs.nasa.gov/webb/2022/04/21/is-webb-at-its-final-temperature/
10. https://blogs.nasa.gov/webb/2022/04/14/webb-will-study-formation-composition-clouds-of-distant-worlds/

[wispy sun]

I deleted the file storing previously sent links so that that last one would send

[wispy sun]

https://blogs.nasa.gov/webb/2022/06/03/the-modes-of-webbs-niriss/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/06/03/the-modes-of-webbs-niriss/

[wispy sun]

lol

(I restarted NetworkManager on the server)

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/06/03/the-modes-of-webbs-niriss/
2. https://blogs.nasa.gov/webb/2022/05/26/webbs-quest-for-primeval-black-holes/
3. https://blogs.nasa.gov/webb/2022/05/19/webb-nearly-set-to-explore-the-solar-system/
4. https://blogs.nasa.gov/webb/2022/05/12/seventeen-modes-to-discovery-webbs-final-commissioning-activities/
5. https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/
6. https://blogs.nasa.gov/webb/2022/05/05/examining-the-heart-of-webb-the-final-phase-of-commissioning/
7. https://blogs.nasa.gov/webb/2022/05/02/nasas-gregory-robinson-named-finalist-for-service-to-america-medal/
8. https://blogs.nasa.gov/webb/2022/04/29/the-hot-and-cold-of-webb/
9. https://blogs.nasa.gov/webb/2022/04/28/nasas-webb-in-full-focus-ready-for-instrument-commissioning/
10. https://blogs.nasa.gov/webb/2022/04/21/is-webb-at-its-final-temperature/

[brave coral]

Days since last Webhook Malfunction: 3
Days since last Webhook Malfunction: 0

[grave carbon]

Lol

[wispy sun]

I swear I didn't do anything this time

[safe bronze]

Gotta make a proper database of articles it's already sent :P

[wispy sun]

gotta do some error handling for webhook sending :p

did you know: webhooks can apparently unarchive threads

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/06/08/webb-engineered-to-endure-micrometeoroid-impacts/

[wispy sun]

wow, it actually worked this time

so I read it

in other words: webb got hit by a large(r) rock

[brave coral]

oh no

is it okay?

the team found the telescope is still performing at a level that exceeds all mission requirements despite a marginally detectable effect in the data

poor baby :(

[calm flint]

Makes me wonder how much micrometeoroid abuse the ISS has suffered over the years.

[noble quarry]

This most recent impact was larger than was modeled, and beyond what the team could have tested on the ground.
👀

[noble quarry]

possibly less in some ways and more in other ways (more human-made stuff, fewer actual rocks would be my guess)

out at L2, there's no shielding at all except what you bring with you

[calm flint]

Ofc, but it has also been running for a considerable time & has less margin to sacrifice components & remain operational.

[noble quarry]

well, the ISS also has a lot more armor than webb

the ISS's solar arrays are probably the main thing sensitive to small micrometeor impacts

maybe we're saying the same thing, actually

[calm flint]

Either nothing has hit it, stuff has hit it in an entirely undramatic fashion, or news simply didn't spread if repairs from a strike was needed.
I'd like to think fixing a space station that is manned would make some kind of newsworthy material.

[noble quarry]

stuff has hit in an undramatic fashion, mostly; for the big stuff, they move the station

I bet if you looked at the armor layers, you'd find them riddled with pocks

I don't remember if anyone on EVA has been hit by micrometeors or not

[wispy sun]

I'm awed by the simple fact that it's both detectable and quantifiable

[modest dune]

Webb’s tremendous size and sensitivity make it a highly sensitive detector of micrometeorites; over time Webb will help improve knowledge of the solar system dust particle environment at L2, for this and future missions.

Reminds me of a response from one of the Stellaris storylines...

But what can we learn from this?

[brave coral]

Intriguing

[modest dune]

https://www.youtube.com/watch?v=LEudTOJQ8xo

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/06/09/scheduling-webbs-science/

[bold bronze]

Lol this is what I was thinking. It is kind of funny that even things impacting the telescope provides science for us, even if a potentially damaging side effect of just being there

[modest dune]

Ablative..testing methodology D:

[noble quarry]

new "telescope" idea: giant sheet of hexagonal tiles full of scintillators and particle/debris trackers

actually might not be a bad idea to put them in various orbits to see what they "see" (feel?) over an extended period of time; we could probably get some very useful statistical data for making better armor

[bold bronze]

The Philae lander showed why these things need to be over-engineered to hell and back. It had 7 different landing systems and they all failed, leaving it to land upside-down in a ditch, as a solar powered lander 😬

[autumn sierra]

https://science.slashdot.org/story/22/06/10/0114211/james-webb-telescope-hit-by-large-micrometeoroid

Time to go to war with the universe!

[pseudo comet]

space-dust hits super-expensive telescope and everyone but NASA is freaking out over this

[calm flint]

They're just biding their time to ask funding for the Megamaid project to deal with the dust.

[pseudo comet]

a project to take the breath away from proponent, critics, and ambivalent parties alike?

[frail atlas]

Poor JWST

Got smacked by a space ball of rock

[eternal oar]

JWST all alone, no one to give it chicken noodle soup to feel better

This is truly tragic

[frail atlas]

Yea

Sad

🙁

[pseudo comet]

re: dust, intersecting with dust, and the misplaced freaking out
wait a sec this was brought up months ago

[wispy sun]

https://blogs.nasa.gov/webb/2022/06/16/webbs-mid-infrared-spectroscopy-will-reveal-molecules-elements/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/06/16/webbs-mid-infrared-spectroscopy-will-reveal-molecules-elements/

[wispy sun]

"server" got unplugged

[wispy sun]

https://blogs.nasa.gov/webb/2022/06/23/webbs-nirspec-acquires-multiple-targets/ don't know what happened this time

[normal terrace]

can't wait for the mission to start

[wispy sun]

https://blogs.nasa.gov/webb/2022/06/27/webbs-niriss-ready-to-see-cosmos-in-over-2000-infrared-colors/

I should probably check and make sure webbhook is ok
webbhook is not, in fact, ok

[safe bronze]

Died right after the last one

[modest dune]

https://www.reddit.com/r/space/comments/vnmasy/nasa_scientists_say_images_from_the_webb/

webb deep field, let's go!

[grave carbon]

Super exciting stuff

[grave carbon]

Also sampling the spectrum of an exoplanet atmosphere

That's more exciting to me I think

Since that's actionable information, if not in our lifetimes

[modest dune]

If deep field shows galaxies that are too mature too far away / "early" then it might be evidence of the entire history of the universe needing adjustment

over time we've seen more and more evidence that things have formed surprisingly fast compared to expectation

if the antimatter from the big bang isn't missing, but is actually in halos of neutrinos and higher density in the earlier universe causing time compression--... annnyway

[reef sequoia]

I chose a very interesting time to get into physics lol

By the time I graduate our entire theory of the universe may have changed

[modest dune]

we don't have enough neutrino data yet...but there's a hint that matter and antimatter neutrinos oscillate at different rates, and I'm seriously suspicious that it could be due to them having different rates of time progression from their own gravitational influence

[ornate marsh]

our entire understanding of cosmology?

that seems highly unlikely, but who knows

[modest dune]

if inflation, dark matter, and dark energy turn out to be different facets the same thing (gravitational time compression pushing inward and outward around galaxies)..that's pretty serious

[ornate marsh]

well, the first and last are definitely linked since the latter is the leading hypothesis for the former

[modest dune]

you're distinguishing between inflation and accelerating expansion right?

[noble quarry]

and then there's the bouncing cosmologies

[ornate marsh]

do you mean inflation like metric expansion or inflation like the very first moment of the universe?

[noble quarry]

the latter

[old charm]

inflation without qualification generally refers to the latter

[ornate marsh]

it's a notoriously difficult thing to study on account of the universe being opaque at that time

[old charm]

like people

[noble quarry]

worse, really; you can still shove photons above a certain energy right through people

[wispy sun]

ouch

[noble quarry]

in fact, there's probably high energy photons passing through all of us right now (just a few)

[wispy sun]

or are they waves?

[old charm]

I was going for the double meaning of people being physically opaque but also psychologically obtuse

[modest dune]

hehe

[ornate marsh]

either too much energy or not enough energy, they're only opaque if it's the right amount of energy

[grave carbon]

Yo mama so dense, she could survive Chernobyl

[wispy sun]

she also weighs 207.2 grams per mole

[noble quarry]

now for some reason I'm imagining hooking someone up to a spectrum network analyzer and measuring their transfer function 😛

[bold bronze]

JWST scientists really have that tease kink

Telling us this and making us wait till 12th

[brave coral]

NASA said it plans to release several images beginning at 10:30 am ET (14:30 UTC) on July 12, the result of Webb's "first light" observations
yoooo

[last shadow]

10 days cant wait

[normal terrace]

Saaaaaaaame

[noble quarry]

JWST: I waited for 10 years; you can wait for 10 days!

[brave coral]

I waited 10 years too!

[normal terrace]

Just to be clear, anyone online at this time should find and post links/photos for the rest of us. That way we are all notified asap

[noble quarry]

we'll be the webbhook we want to see in the world

[modest dune]

I've got enough of these so it's confusing due to Discord not supporting different sounds per-source, but..maybe..

[normal terrace]

of course I have those enabled. But I personally won't be the first to see the images, most likely.

[carmine olive]

can we get an @ everyone ping (or a pinglist) when pictures come out

[normal terrace]

I just got pinged for that message, along with everyone who enables notifications for the thread. (see above)

[halcyon goblet]

Can't wait to see!

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/01/how-to-see-webbs-first-images/
2. https://blogs.nasa.gov/webb/2022/06/30/another-webb-telescope-instrument-gets-the-go-for-science/
3. https://blogs.nasa.gov/webb/2022/06/27/webbs-niriss-ready-to-see-cosmos-in-over-2000-infrared-colors/
4. https://blogs.nasa.gov/webb/2022/06/23/webbs-nirspec-acquires-multiple-targets/

[modest dune]

Countdown: How many minutes left? The official countdown is at https://webb.nasa.gov/content/webbLaunch/countdown.html

Watch: See the images revealed in real-time and hear from experts about the exciting results on NASA TV at 10:30am Eastern on July 12: https://www.nasa.gov/nasalive

View: Just interested in the amazing imagery? You will be able to find the first images and spectra at: https://www.nasa.gov/webbfirstimages

Participate: Attend, virtually or in-person, one of hundreds of official Webb Space Telescope Community Events happening in the next few months! Find an event near you at: https://webbtelescope.org/news/first-images/events

Socialize: Follow along on Twitter, Facebook, and Instagram with @NASA and @NASAWebb using #UnfoldTheUniverse!

Download: High-resolution downloads and supplemental content will be available for download at: https://webbtelescope.org/news/first-images

Ask: On July 13, ask your questions about these first images and spectra using #UnfoldtheUniverse, and you could see them answered on NASA Science Live at: https://www.nasa.gov/nasasciencelive

[wispy sun]

Oh yeah

Webbhook is back

cheering sounds

[reef sequoia]

When the world needed him most, he returned

[noble quarry]

webbhook is the webhook we needed, not the one we deserved 😛

[red sail]

The James WebbHook?

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/06/webbs-fine-guidance-sensor-provides-a-preview/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/07/webb-the-world-is-about-to-be-new-again/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/07/nasas-webb-telescope-nirspec-instrument-ready-for-science/

[modest dune]

interesting link https://illuminateduniverse.org/2021/04/01/image-artifacts/
from https://www.reddit.com/r/space/comments/vtjxet/even_the_webb_telescopes_engineering_test_images/

[pseudo bramble]

Interesting read on image artifacts.

[grave carbon]

https://www.engadget.com/james-web-space-telescopes-first-image-will-be-revealed-today-at-5-pm-et-081523983.html

[modest dune]

Politics o.O

[pseudo bramble]

Eh, not a big deal imo. NASA is inherently an independent agency of the U.S. federal government, so having the president reveal images isn't some huge shift of no politics involvement to some politics involvement.

Having the president apparently show non-zero interest in science related things feels kinda nice.

[modest dune]

I'm a bit cynical about the intention for the sentiments to flow the other way instead but agreed

[calm flint]

Bit interesting that the reveal of one pic is one day ahead of the others & not a continuous event.

[pseudo bramble]

Anyone have links of comparison images showing Hubble, ground telescope images of the JWST press release targets? Or probably best to wait for the press release since people will do the comparisons then.

Sounded like 16 hours ahead of the other images. Effectively is the same time.

[pseudo comet]

I'm taken aback because I thought the space program was more directly under the vice-president's direction

[brave coral]

first pic leaked early

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/11/nasas-webb-telescope-is-now-fully-ready-for-science/

[pseudo comet]

Now you will experience the resolution of this fully-calibrated and operational space telescope. Science at will, commander!

[carmine olive]

PICTURE????

(PING ME))!!!!

[last shadow]

37 minutes

[carmine olive]

I thought it was 5pm edt

whacky

[modest dune]

I thought so too

yeah they totally changed the timeline

They have altered the timeline, pray they do not alter it further!

[pseudo comet]

NASA'll have those images up, we just gotta give 'em more time!

[noble quarry]

stay on target, stay on target

[modest dune]

Well, it says momentarily. Music to listen to, I guess.. https://www.youtube.com/watch?v=21X5lGlDOfg

[calm flint]

Now I can't remove the image of JWST powering up & firing like the Death Star as a camera flash to take those pictures....

[modest dune]

Isn't there an xkcd for that?

https://xkcd.com/2564/

xkcd: Sunshield

RIP the surface of Mars

[pseudo bramble]

It’s more like a death star on light suck mode though

[modest dune]

That alt text 😂

[noble quarry]

it takes a long time to charge up; after a few decades of operation, it should have collected enough photons to fire quite the intense IR beam at the target of our choice 😛

[pseudo comet]

is it not more like Starkiller base, where it consumes a star in the process?

[calm flint]

Our gravitational anchor is a small price to pay for science

[noble quarry]

I'm enjoying this music, though

[calm flint]

130k viewers. Rising. Not bad.

[last shadow]

its already late tho its one day early so I guess we cant complain

[reef sequoia]

I'm dual wielding the superheavy B7 test livestream and the JWST livestream
(B7 just had a very un-nominal explosion)

[proud badge]

wait how come I didnt see this channel until someone said it in chat

[reef sequoia]

It's a thread, it's not shown by default

[proud badge]

I saw some people talking about Elon Musk being rich in this chat. I cannot believe there are actually people in the government who call him a mooch. If you produce more value than you take... making rockets reland themselves has got to be worth billions, then half that goes to taxes, and he only pays his actual personal account minimum wage? Give me a break

[reef sequoia]

I don't like him, but I like what he does. This is definitely a conversation for #more-offtopic though

[normal terrace]

this is for JWST fanboiism. not Musky fandom. js.

[proud badge]

I'm waiting at a restaurant and this NASA stream is still just saying momentarily

[normal terrace]

meanwhile we're all getting pings for this convo

[pseudo comet]

(at this rate, you will arrive in the #programming channel basement within the hour 😅 )

[thorn musk]

11:08pm, do I go to bed...

[carmine olive]

frankly u can't complain about it

[thorn musk]

maybe in time JWST will explain why tf it was 30C in north-east UK

[normal terrace]

I'm not really, but this doesn't concern the thread topic. also my name isn't Frank 😛

[pseudo comet]

well, we're eight minutes past the hour, so I think we can rule this out for now, unless something else went wrong

[carmine olive]

youtube says t-2min

[last shadow]

what stream?

[normal terrace]

stream

[last shadow]

NASA's yt says begin momentarily

[thorn musk]

also its apparently going to be a deep field image?

[calm flint]

Time is relateve. It is known.

[thorn musk]

no you dont understand, it did start when it was supposed to, it just has to arrive now

[reef sequoia]

I should be writing GUI code, but here I am staring at my screen like a child on christmas morning

I'm about as impatient as a child too

[normal terrace]

it live

IT'S LVIE

[modest dune]

It's starting aye

[normal terrace]

LIVE

WATCH THE STREAM

DO IT

[modest dune]

Do I dare ping..

nope.

[calm flint]

The stars have aligned!

[reef sequoia]

Lol, all I had to do was complain!

[pseudo comet]

the light has arrived!

[reef sequoia]

An historic occasion. Off to a great start!

[normal terrace]

[reef sequoia]

Any bets at how long we have to sit through political junk before they actually show us the picture?

[normal terrace]

30 mins

and the sign language lady is SUPER into this

[noble quarry]

"I'd like to thank the Academy ..."

[normal terrace]

we know, kamala

[calm flint]

As long as they spare us the kids interpretations in the form of drawings of the event.

[reef sequoia]

No joke, this is literally the first time I have seen her since the election. I forgot what she looked like

[thorn musk]

I shouldve went to bed

[normal terrace]

I can't get over SL lady's expressions

it looks like me explaining my trip to Casa Ole

[reef sequoia]

I'm just muting it and will unmute when I see aliens

[thorn musk]

doing the opposite but with headphones off

[last shadow]

blah blah blah america blah blah blah

[pseudo comet]

in no small part, expressions are part of ASL

[calm flint]

FBI will have the aliens pixelated.
Sorry in advance.

[reef sequoia]

AHFRICK just got a work call nooo

[thorn musk]

lol could you imagine if they did it super obviously

[normal terrace]

"sorry, Raiguard died. He'll call you tomorrow."

[thorn musk]

hey look biden said "a historic" :P

[normal terrace]

a SUUUUUUUUUUU

[thorn musk]

oh that wasnt just me

[modest dune]

The audio got stuck looping for me just now. Welp.

[thorn musk]

reload page

[last shadow]

its fixed now for me no reload needed

[noble quarry]

[normal terrace]

We haven't even seen an image, and he's asking for money

[noble quarry]

"nothing beyond our capacity"

I mean, it's true, it's all a matter of will

[normal terrace]

PIC

[thorn musk]

dont say more-offtopic things, even though I know I want to

[calm flint]

... but then I got high.

[noble quarry]

enhance!

[thorn musk]

its a blurry starfield WORTH IT

[modest dune]

and it's still a frame wihin a frame

I like the fact that it's showing so much lensing

[thorn musk]

its like 4 frames deep

browser, youtube, conference, projector, image

[last shadow]

give us a download link to the full quality image

[normal terrace]

sorry, when did we ever think there was one galaxy?

[reef sequoia]

That looks really cool!

[normal terrace]

4000BC?

[modest dune]

when the other galaxies were nebulae

No, it was last century.

[reef sequoia]

I speedran that call so fast lol

[calm flint]

Spot the monoliths!

[modest dune]

Even plate tectonics were last century.

[reef sequoia]

3.5 minutes

[thorn musk]

NO WHY DID YOU USE MILES

the m/s one is so clean

[last shadow]

because 'murica

[thorn musk]

just round it up a hair

3 million m/s

no, billion

right?

million >.>

[carmine olive]

can someone screenshot the pic at a highish quality

[thorn musk]

youtube is capping it at 720p60

[normal terrace]

when Nancy Grace Roman Telescope thread?

[reef sequoia]

Oh yeah, it's NASA TV. 720p lol

[thorn musk]

well ive seen the pic now

[carmine olive]

good enough I'm no mobile rn

[thorn musk]

off to bed, ill look at the hopefully 64k or whatever image tomorrow

wonder what itll look like pointed at a relatively nearby planet

[last shadow]

worlds most powerful spy sattelite

[reef sequoia]

I can't wait for the spectrograph data

https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-delivers-deepest-infrared-image-of-universe-yet/

There is probably a high res version here, but the site is down

[normal terrace]

I wonder why

[reef sequoia]

Here's a higher res version than a youtube screenshot, at least

Look at all of the gravitational lensing going on

[normal terrace]

i'm not an astrologer. Is that lens flare in the center?

[reef sequoia]

Probably just a ton of dust

[calm flint]

OOooh, ambience.

[reef sequoia]

Aha!

https://www.nasa.gov/sites/default/files/thumbnails/image/main_image_deep_field_smacs0723-5mb.jpg

[noble quarry]

my god it's full of galaxies

[reef sequoia]

From what I can tell, the full res uncompressed version will be released tomorrow. This is just a preview like the title said

[last shadow]

time to hack nasa's database to get the uncensored version that has alien life

[reef sequoia]

But man, I keep zooming in and finding more galaxies!

[pseudo comet]

dammit, space!

[calm flint]

The observable universe, now as a NFT.

[reef sequoia]

I bet there are already several dozen NFTs of this (attempting) to be sold

[proud badge]

where is the nasa website link for the image

[reef sequoia]

Here

[modest dune]

Welp, I've got a new profile banner

[normal terrace]

desktop and mobile background here

[modest dune]

darnit the embedded icon in the bottom left obscures the smooshy galaxy

[normal terrace]

also I turned off notifications for this thread

[modest dune]

I love the sense of depth in this snippet though

[old charm]

Smooshed lensed galaxy on the left

[modest dune]

yeah, but if you look at my profile-

miscalculation on my part

[last shadow]

rotate it so its in the other corner?

it's not like space can be upside down

[reef sequoia]

Hubble's view of the same area

[pseudo bramble]

Comparison image, nice.

Bit rusty on my gravitational lensing, but I assume the center dusty area is because of foreground galaxy cluster (the dusty bit) which is massive enough to create the lensing on either side of it.

So the ultra extra deep objects would be the distorted objects.

https://arstechnica.com/science/2022/07/webbs-first-light-reveals-a-plethora-of-galaxies-in-a-tiny-patch-of-sky/

I find the Ars Technica writers do a good job of making this type of info more readable for non experts.

[reef sequoia]

Eric Berger is a pretty decent reporter

[ornate marsh]

I like how you can tell which is which by the diffraction spikes: the secondary mirror on HST has 4 struts and point sources have 4 spikes, while JWST only has 3 struts so stars have 6 spikes

[pseudo bramble]

https://www.reddit.com/r/jameswebb/comments/vww7ra/better_gif_of_the_jwst_first_real_photo_comparison/

Gif toggling between the two images. Presumably the galaxies visible only on the IR of JWST are the especially distant (red shifted).

Deploy the armchair astronomy.

[rain oracle]

Am I A Robot?

Today I discovered that my sense of time stops in between messages. Does this mean that I live on a computer somewhere?

[brave coral]

wow it looks so much better!!

||this is a joke. i took the old image and clicked "auto levels" in my photo editor||

[modest dune]

https://old.reddit.com/r/jameswebb/comments/vwv8zn/above_what_we_could_see_before_below_the/

[old charm]

This needs not-Reddit/Discord image compression

[wispy sun]

https://stsci-opo.org/STScI-01G7JJADTH90FR98AKKJFKSS0B.png

https://stsci-opo.org/STScI-01G7JJADTH90FR98AKKJFKSS0B.png

(full res? mostly?)

[old charm]

I mean more the comparison image on that post

I fear the takeaway from it is going to be “wow it sees more colors” and not “wow look at how much more detail we see”

[modest dune]

It could use two presentations: One for the overall view, and one focusing in on a smudged part of the Hubble image and showing the true full resolution so zoomed that it won't suffer much from compression when reposted

[pseudo bramble]

https://youtu.be/21X5lGlDOfg

The presentation is currently taking place. You can scrub through the youtube vod in real time btw.

[wispy sun]

https://stsci-opo.org/STScI-01G79R51118N21AAZ9MZ8XWWQ6.png

https://preview.redd.it/m05zphsvo5b91.jpg?width=640&crop=smart&auto=webp&s=93ffded10ceb5c5fe88ca44073b553810abebabb

https://preview.redd.it/l6xxk55wo5b91.jpg?width=640&crop=smart&auto=webp&s=b7e96ecaadf363b7793723337644c0582346d59d

https://preview.redd.it/cxng3xkwo5b91.jpg?width=640&crop=smart&auto=webp&s=5db0a3d725ef1f20bd0168ee7e9b1da402f7c1db

[last shadow]

those are amazing

especially the first wow

full-res ( i think ) yay!

[wispy sun]

That is me, yes

[brave coral]

the NASA site has 2 images of the Southern Planetary Nebula but isnt clear what the difference is. Is one Hubble or is one taken with a different camera?

https://www.nasa.gov/sites/default/files/thumbnails/image/main_image_stellar_death_s_ring_miri_nircam_sidebyside-5mb.jpg

https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-captures-dying-star-s-final-performance-in-fine-detail

im thinking different camera but....

[thorn musk]

one on the right doesnt have the tell-tale 6-point stars that webb appears to make but that could be instrument based

but IIRC it was because the mirrors are hexagonal

one on the right also appears more blurry and less contrasty

oh text clarifies

"Two cameras aboard Webb captured the latest image of this planetary nebula, cataloged as NGC 3132, and known informally as the Southern Ring Nebula. It is approximately 2,500 light-years away."

I love the left one though, the texture it appears to have reminds me of...coral or bone marrow?

or an eye

the only real question I have is "wtf is that?"

some sort of massive accretion disk?

(left side of image, about a third down)

if anything it makes me think its a black hole tbh

or a far-off galaxy photobombing

[brave coral]

thanks! but which is which?

[thorn musk]

iunno

[brazen pawn]

the left one was taken by the NIRCam i believe

[bold bronze]

in the image from Webb’s Near-Infrared Camera (NIRCam) on the left, while the image from Webb’s Mid-Infrared Instrument (MIRI) on the right shows for the first time that the second star is surrounded by dust

[brisk cloud]

i definitely think that's a galaxy

[brave coral]

its almost certainly a galaxy

[thorn musk]

probably but maybe its not

[brisk cloud]

the resolution on this nebula picture is blowing my mind

[thorn musk]

honestly I wish it wasnt there

for the purposes of a wallpaper

[brisk cloud]

the universe is not obligated to be your wallpaper

[thorn musk]

well maybe the universe shouldnt look awesome

[brave coral]

here's the sombrero galaxy for comparison

[brisk cloud]

god's sombrero

are the images true color

[brisk cloud]

the right image looks more like what i would expect

[bold bronze]

Surely not since JWST only captures in infrared?

[brave coral]

yeah it cant be true color because the cameras they used take infrared but it could be blueshifted into color. or it could be something else

[brisk cloud]

i see

[brave coral]

for example in this picture of the southern planetary ring nebula from hubble blue is hotter gasses, orange/red is cooler gasses

[brisk cloud]

surely we know what the materials of the layers are and can approximate the color we would see

iirc it's usually very pink

my discord banner

[brave coral]

thats also possible! you could have artists go in and pick a color to add in manually

[brisk cloud]

i like talking about space in a non space discord because i cannot be judged for wrong conclusions

unlike when i'm talking in spaceengine

everyone knows everything

[brave coral]

so i couldn't find a true color image of the southern ring nebula, but here's an amateur photograph of the ring nebula in true color, taken by a redditor with a 6" newtonian

[brisk cloud]

Not very far off

[brave coral]

@old charm you were complaining that the JWST comparison image was too low res .... I dont think people care. found this beaut in another discord LOL

[carmine olive]

oh god

fullres images:
https://stsci-opo.org/STScI-01G7ETPF7DVBJAC42JR5N6EQRH.png
https://stsci-opo.org/STScI-01G7DBWJJF54AX1DDP8KJ6XCPQ.png
https://stsci-opo.org/STScI-01G7DB1FHPMJCCY59CQGZC1YJQ.png
https://stsci-opo.org/STScI-01G786E1PW9RMK51EP0DZSM03B.png
https://stsci-opo.org/STScI-01G79R51118N21AAZ9MZ8XWWQ6.png
https://stsci-opo.org/STScI-01G7JJADTH90FR98AKKJFKSS0B.png

LOL discord cannot handle them

[pseudo bramble]

@thorn musk The video presentation astronomer for that image mentioned that it was a background Galaxy.

[thorn musk]

bah, no aliens this time

curse you, logic and reason shakes fist

[gloomy arrow]

I think what’s equally as impressive is Hubble took two weeks to take that image JWST took a couple hours

[thorn musk]

wasnt it 15 hours or was that another image?

[gloomy arrow]

Not sure on the exact time, all I know is the exposure dates only include the 7th of June and the nasa lady said “it was done before breakfast”

[gloomy arrow]

My work colleague doesn’t think we ever went to the moon 🤦‍♂️

[glad mist]

Show him the reflector we placed on the moon…

[brave coral]

its okay, I dont believe he exists either

[old charm]

https://johnedchristensen.github.io/WebbCompare/

much better for comparing the old to new

[brave coral]

interesting that there's a distorion between them near the edges of the image

[modest dune]

that site really does not like dynamic browser zoom

[pseudo bramble]

Rip mobile users clicking that comparison image link 👀 (because it’s super data heavy which is bad if data limited)

[old charm]

works just fine on mobile for me

[brisk cloud]

125MB image good lord

looks incredible of course

[normal portal]

Not sure I understand, does the picture cover one-fifth of the moon if it were printed in full-res? Or is the part of the sky that jwt recorded to make this picture, the size of 1/5 the moon seen from earth?

[ornate marsh]

1/5 the angular size of the moon (ie 6 arcminutes)

[normal portal]

That is a relatively big part of the sky

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/13/nasa-reveals-webb-telescopes-first-images-of-unseen-universe/

[modest dune]

I just noticed this regarding the deep field image with the lensing-

This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground.

[safe bronze]

Yup, there's a lot of stuff around us...

[pseudo bramble]

I heard the grain of sand irl is commonly 2-20x smaller than the value given by the NASA metric; still impressive.

[safe bronze]

lol

[pseudo bramble]

Obviously it’s a very high error margin metric to give people some idea of the field of view being discussed. Arm length varies; sand grain size varies; overall value ends up highly imprecise.

[noble quarry]

as long as it gets you to the right order of magnitude ...

[brave coral]

classic physicist

anyone know the actual angle of the photo? i havent been able to find it online! but I feel like it should be somewhere

[pseudo comet]

'angle of the photo'… as in, where in the sky it was pointed?

[old charm]

Angular size?

[modest dune]

https://en.wikipedia.org/wiki/Webb's_First_Deep_Field

doesn't have that detail, but it should!

[modest dune]

https://www.reddit.com/r/space/comments/vy3a3h/james_webb_deep_field_image_scale/

[pseudo bramble]

The actual NASA image page should contain all the proper image documentation. Number of arc seconds or arc minutes. I assume that was mentioned just above.

Using the moon for scale is pretty nice imo.

[modest dune]

https://imgur.com/gallery/UsQICEI

https://i.imgur.com/LInIeHG.jpeg

[modest dune]

Zoom in, sequence: https://www.reddit.com/r/space/comments/vy8u7x/a_progress_of_images_taking_us_from_an_ground/
Zoom out, animated: https://www.reddit.com/r/gifs/comments/vygdk0/i_made_this_short_video_that_zooms_out_of_jwsts/

[brave coral]

very cool

[modest dune]

weird..the embed of the gif cuts off a lot inside Discord (this is from the site)

[normal portal]

Offtopic space question, does any one know how to interpret the planck cmb map? It's an oval 2D image, but does it represent a 3D ovoid radiation map seen from one side or how come it's oval?

Hm.. I think I found the answer

[ornate marsh]

https://en.wikipedia.org/wiki/Mollweide_projection

[brisk cloud]

bruh.

it finally makes sense

not like i understand how it actually can be put to use

was the universe always expanding "faster" than the speed of light?

[thorn musk]

I dont think thats answerable because it could be the case that its spatially infinite in which case you can probably always pick two points and show they move apart faster than c

and if its not spatially infinite then early on its likely not the case

[modest dune]

Best so far- https://www.reddit.com/r/space/comments/vys73z/where_in_the_night_sky_exactly_are_the_cosmic/

[rain oracle]

Recent NASA JWST Blog Posts

1. https://blogs.nasa.gov/webb/2022/07/14/webb-images-of-jupiter-and-more-now-available-in-commissioning-data/

[brave coral]

Fans of Jupiter will recognize
LETS GO JUPITER

i wish they gave more info about exposure times and stuff. they mention the blown out image that has the rings was a one minute exposure, but not much else

[carmine olive]

lol guys

of course the photo release was delayed

it's the james webb! It was it's last final delay

[noble quarry]

I don't think current cosmological models claim that; during the inflationary period, it may have been, though

[modest dune]

https://en.wiktionary.org/wiki/Hubble_volume

[noble quarry]

ah, right, I guess that's a better way of phrasing my comment

the inflationary era led to a causally-disconnected region; everything within that border (causally-accessible to us) is the Hubble volume, I guess

[brave coral]

my understanding is that it is not known if the universe is infinitely large. if it is, then hexi's answer seems right -- you can always find two points that are moving away from each other at or faster than the speed of light

my other understanding is that the universe expanded quickly near the start, then slowed down for a while. more recently, the expansion has been accelerating

[old charm]

the phrase "expanding faster than the speed of light" is problematic yeah

it requires defining at least two points to measure the expansion between, which can be entirely arbitrary

[thorn musk]

my understanding is that its not known which of the two - space and time - are infinite, if either

if I understand things properly the universe could be ageless but finite

in an endless bang-crunch cycle

the only thing you can reasonably infer is that at least one of them is finite

otherwise youd have light from all directions

[modest dune]

that's a question of density, not size

[brave coral]

https://en.wikipedia.org/wiki/Olbers'_paradox

the universe cannot be infinite, static and homogeneous

(current thinking says the universe is not static)

i dont think there's any reason to think that at least time or space need be be infinite, could be neither as far as i know

[modest dune]

did you mean for the first could to be should?

[brave coral]

yes

[carmine olive]

the universe can be infinite with a finite amount of mass

[thorn musk]

I dont think there needs to be a finite amount of mass

as long as the distribution is homogeneous at a large scale the forces cancel out

and with finite time you dont have the fullbright sky issue

[modest dune]

hubble volume is simultaneously finite causality and possibly infinite chain of volumes making up more than the observable universe

[ornate marsh]

Wikipedia, what are you doing?

[brave coral]

Olbers's's's's

[modest dune]

https://www.reddit.com/r/space/comments/vzz3vk/new_from_webb_infrared_image_orangered_of_spiral/

[old charm]

I'm glad galaxies are prettier in visible light

[brave coral]

no way infrared looks crazy cool

[ornate marsh]

vislight = pretty
IR = cool

[old charm]

Did someone happen to drop the full-full size image of the cosmic cliffs in here at some point?

ah, found it

[pseudo bramble]

It’s interesting to consider that at the distances and scales that astronomy telescopes observe, the wavelength of light is irrelevant for the resolving power (generally). Since objects like stars are massively larger than the wavelength of light.

Also, the broader fields of spectroscopy and spectrometry have a lot of additional breadth that isn’t possible for telescopes like JWST despite there seemingly like a large difference between Hubble and JWST.

[brave coral]

it actually does matter! because the telescope's size in relation to the wavelength becomes significant

[pseudo bramble]

I was more speaking to the size of the objects being viewed. The telescope size is definitely a consideration.

I assume the objects being viewed are more limited by like the amount of photons created and the resolving power of the telescope means that every object is really big.

Guess it needs an IRL example where the light being detected by an instrument/camera is based on being a completely different class of object. With astronomy I'd assume that a lot of the objects being viewed appear in a broad range of wavelengths ala stars viewable because of thermal emission.

Maybe cosmic dust is a category where you need specific wavelengths of light to view it. Gamma ray, x-ray specific emission maybe also has very specific targets that aren't viewable at other wavelengths.

Idk. I'm just meandering around here without any specific, well thought out ideas.

.
JWST viewing galaxies (stars) in IR despite the original light being higher frequency is interesting. It especially highlights how it's all the same electromagnetic radiation emitted by similar objects (stars), detected by telescopes.

Now I wonder what causes dust to fully obstruct visible light. Is it direct absorption or a form of scattering. Hmmm. Ala JWST's ability to see dust obstructed stars.

[noble quarry]

probably both absorption and scattering

[pseudo bramble]

Yea. I assume some of both.

[modest dune]

That's..an unexpected indirect source of this information :P https://www.reddit.com/r/Stellaris/comments/w2fodt/we_may_soon_find_out_if_it_looks_the_same_as_it/

[thorn musk]

theyre very optimistic on the resolving power of JWST :P

at best itll confirm that general compositions match as well as orbits

[brave coral]

The viewing schedule for Webb: https://www.stsci.edu/jwst/science-execution/observing-schedules
According to a later tweet from Dr. Becky, it updates every Friday.
(from the reddit thread)

Friday Webb Facts 👀

[wispy sun]

https://blogs.nasa.gov/webb/2022/07/15/senior-project-scientist-john-mather-reflects-on-journey-to-webbs-first-images/ Webbhook broke again

[brave coral]

whats that

found on mars

[modest dune]

https://www.youtube.com/watch?v=d_FIxBe54uc

heheh https://www.youtube.com/watch?v=yvqsL8-jylA