Question: Is there a limit to how much you can zoom in with telescopes without it being blurry, or does it depend on the size of the telescope?

Elizabeth Pearson answered on 14 Mar 2012:

Yes there is actually. The bigger your telescope the further you can see but for Earth based telescopes there’s something called the ‘seeing limit’ which is where the turbulence in the atmosphere causes the light rays coming though to ‘wobble’ and blurs the image (it’s why stars twinkle). This actually determine how small you can see something on the sky, but far things look smaller.