How do I zoom into each planet?

[sage dawn]

You are using orbitcontrol, right?
Then you can use orbitControls.target(x, y, z).

You may can ask to chatGPT

const orbitControls = new OrbitControls(camera, renderer.domElement); orbitControls.target.set(0, 5, 0);

WYM?
Could you explain your requirements more detaily?

Then what is the problem using target?
You can set target position as Earth's current position and set camera position with Earth's current position.
For example,
orbitControls.target.set.copy(Earth.position.clone()); camera.position.set(Earth.position.x + .., Earth.position.y + .., Earth.position.z + ..);
I think it must be in animate function to set these values real-time.

?????????
You can deal with that with initial knowledge of js.

[sullen sleet]

just use camera-controls, google it, it's a controlable orbit control

it can zoom-to-fit objects easily

here are two examples, this uses setLookAt https://codesandbox.io/s/enter-portals-9m4tpc

and this one uses fitToBox https://codesandbox.io/s/portal-shapes-8j36ok

[sage dawn]

I think this thing makes this channel dirty.

[sullen sleet]

it's not so complicated either, cc works just like oc, the docs describe how to use it https://github.com/yomotsu/camera-controls
the only difference is that you have extra methods like controls.fitToBox(someMesh, true) and that already would do it