I need help with some simple math

[grave pewter]

i fell asleep in class and asked my professor what i missed so now i need to figure out how to estimate the distance of an intergalactic solar system in my head under 4 minutes or else ill fail my grade

[main coral]

maybe 10kg

[sonic glade]

shouldve been dreaming about it bud

[coarse cosmos]

which distance do you mean? The distance from earth (observer) to the galaxy? The diameter of the galaxy?

[mossy gull]

this person might be joking