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1 vote
1 answer
46 views

How do I find out when sidereal time was 13:30 on a certain date and location?

0 votes
1 answer
44 views

2D Galaxy Spectrum taken by long-slit-spectrograph

2 votes
3 answers
176 views

How to calculate distance between stars?

0 votes
2 answers
101 views

Will the Milky Way galaxy revolve around the Andromeda galaxy or vice versa?

1 vote
1 answer
40 views

What parameters about galaxies can be measured using SAO DS9?

9 votes
1 answer
409 views

How many stars are in the Milky Way galaxy?

0 votes
0 answers
44 views

How to draw galactic coordinate grid?

21 votes
4 answers
12k views

Why are galaxies disk shaped?

3 votes
0 answers
38 views

Databases of measurements of galaxies

1 vote
0 answers
18 views

Surface brightness of transparent vs opaque galaxies

1 vote
0 answers
28 views

Magnitude cuts in different bands/surveys

1 vote
1 answer
44 views

How to use SExtractor to calculate Petrosian Radius?

1 vote
1 answer
46 views

Interpreting the color of galaxies in deep field images

5 votes
1 answer
208 views

How to remove redshift from galaxy spectra in Python?

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