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

3 votes
1 answer
94 views

Why are what end up being meteorites not in stable orbit as planets and large asteroids are?

1 vote
2 answers
133 views

If all objects move, where do we go?

0 votes
1 answer
41 views

Why is the CMB's redshift so high?

9 votes
2 answers
776 views

Is it possible to observe strong gravitational lensing with amateur telescopes?

-1 votes
0 answers
56 views
+100

Do neutron stars have something like a gamma-ray photosphere? Are gamma rays from below it limited more by the nuclei or electrons?

1 vote
1 answer
35 views

Orbital speeds of Components of Binary System

3 votes
2 answers
54 views

Solar flare generate energetic protons. Where do the electrons go?

9 votes
3 answers
2k views

Why does the Milky Way appear to form an arch shape across the sky?

3 votes
1 answer
134 views

Have astronomers taken into account the fact that red-shifted light from far-away stars is also very old when studying the expansion of the universe?

4 votes
3 answers
334 views

Mystery CCD camera

0 votes
0 answers
28 views

What happens if supernova undergoes in tightly close multi stars system

2 votes
0 answers
28 views

Telescope's eyepieces got blurry over time

2 votes
1 answer
59 views

What does a narrow-band "point spread function" look like for long exposures from the VLT's large interferometric aperture?

5 votes
1 answer
56 views
+100

What does it mean for something to be optically thick to pair production?

Browse more Questions