Astronomy Stack Exchange is a question and answer site for astronomers and astrophysicists. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Explore our questions

0 votes
1 answer
107 views

If 42000 Starlink satellites interfere with telescope observations from Earth would someone observing from another solar system detect them too?

4 votes
2 answers
3k views

Which place in the world should be best for astronomy with an optical telescope?

11 votes
1 answer
3k views

Are there plans to detect life on Earth from the outer solar system?

1 vote
0 answers
50 views

How do eyepiece mm values equate to telescope tube extension mm values?

5 votes
1 answer
552 views

Would it be possible to use existing radio-telescopes to do spot measurements of CMB?

21 votes
3 answers
6k views

How can telescopes see anything at all?

1 vote
2 answers
278 views

Can telescopes under $200 help you see saturn clearly by eye without editing the image on a computer?

6 votes
2 answers
4k views

What kind of telescope would be needed to image a 10m dim object 1 million km away?

1 vote
0 answers
77 views

How to spot Andromeda in a 130mm telescope?

10 votes
3 answers
2k views

Why are segmented mirrors lighter than monolithic mirrors?

8 votes
1 answer
498 views

General process of calculating what a telescope's diffraction spikes would look like?

3 votes
1 answer
223 views

Is there a maximum practical telescope aperture for viewing (through a filter) a solar eclipse?

4 votes
1 answer
346 views

How to make a 65 cm lens with a 20 cm hole in it for a Hamiltonian telescope?

3 votes
1 answer
289 views

Why do planets just look like a dark ball in my telescope

Browse more Questions