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Top Questions

3 votes
1 answer
197 views

When exactly was the last time that Earth's aphelion coincided (within 24 hours) with the northern winter (December) solstice?

1 vote
0 answers
18 views

The constellation you see when looking at Chicago from the space

0 votes
1 answer
10 views

Do supernova remnant nebula re-collapse into a star?

2 votes
2 answers
100 views

Draco, Thuban and Northern Ecliptic Pole

0 votes
0 answers
20 views

Time taken calculation to reach synodic degrees between planets

12 votes
2 answers
260 views
+50

What's the smallest scale at which dark matter has been measured?

1 vote
1 answer
25 views

Units in distance parallax relation

0 votes
1 answer
28 views

Strange spectral types in star catalogs

5 votes
2 answers
838 views

What does "by an amount" mean here?

2 votes
1 answer
314 views

Mass resolution

2 votes
0 answers
20 views

Mass resolution in cosmological simulations

0 votes
0 answers
15 views

Where can I get a step by step guide to use CASA for obtaining a radio image of a planet like say Jupiter?

1 vote
1 answer
45 views

Sky viewer from the moon

3 votes
0 answers
83 views

CMBR: Is the cold spot a hint at the edge of the universe?

5 votes
1 answer
58 views

What kinds of stars have viable habitable zones other than G-type stars, and what would life be like orbiting them?

14 votes
2 answers
240 views

How bright would the night sky be in the galactic center?

4 votes
1 answer
83 views

Stellar evolution temperature gradient - why the logarithm?

2 votes
2 answers
98 views

What is stopping Event Horizon Telescope the size of the Earth’s orbit?

1 vote
1 answer
24 views

Magnitude difference between companion in binary from mass difference in binaries

-3 votes
0 answers
52 views

if the earth was the size of the sun how big would the moon be [closed]

0 votes
0 answers
30 views

How to get in touch with more societies and astronomy clubs around the world?

0 votes
1 answer
30 views

How to get coordinates and brightness of all stars from 1 constellation on SIMBAD?

8 votes
1 answer
824 views

Binoculars 10x50 in light polluted place

5 votes
1 answer
193 views

Reason for different surface temperatures of Tau Ceti and Epsilon Indi at similar properties

0 votes
1 answer
28 views

Recognize the celestial object in UMa

1 vote
1 answer
31 views

What can we learn from the rotation data of a star?

2 votes
1 answer
49 views

How to use Astropy to edit a keyword (not value) in batches of FITS file headers to be used in AstroimageJ (AIJ)? (summer undergrad research project)

3 votes
1 answer
39 views
+100

Evaluating Potentials using Galpy

1 vote
1 answer
216 views

Query with Gaia: I have a list of 1000+ source_id's. How do I find the associated stars and their data?

2 votes
2 answers
56 views

What does "energy dumped into waves" mean?

2 votes
1 answer
58 views

What criteria determines whether stars are supernova type II candidates?

4 votes
1 answer
2k views

What does "to within less than about thirty Schwarzschild radii" mean?

7 votes
3 answers
662 views

How can I calculate an orbital elliptic trajectory from the velocity vector?

10 votes
2 answers
1k views

JPL Horizons - "highly accurate measurements of planetary positions" - how do they do it?

4 votes
1 answer
362 views

Virial theorem, contraction, and stars getting hotter

2 votes
1 answer
59 views

Are asteroids 2012 PM35 and 2020 OG106 aliases?

1 vote
0 answers
16 views

Can this ppxf fit work?

4 votes
1 answer
330 views

What does using these units (c=G=M=1) in MHD simulations mean?

3 votes
0 answers
47 views

Are the human-made devices on Mars searching for existing life?

2 votes
0 answers
114 views

How the heck does JPL actually do the numerical integration for their development ephemerides? (general questions)

4 votes
1 answer
113 views

About the strange case of Bonnor beams

1 vote
1 answer
83 views

following several unknown phenomena detected at the edge of the solar system, is there a 5th force which acts at the edge of the solar system?

2 votes
1 answer
48 views

Are there areas within Jupiter's magnetosphere without powerful radiation?

1 vote
0 answers
61 views

Can virtual particles with zero energy and non-zero momentum contribute to dark energy?

4 votes
1 answer
106 views

How will the Solar tides affect the Earth's rotation once it is tidally locked to the Moon?

3 votes
1 answer
55 views

Best way to quantify the tidal stress on an exoplanet?

0 votes
0 answers
14 views

Kinematical galaxy spectral analysis using ppxf?

1 vote
1 answer
141 views

Should we fear Wolf-Rayet WR-104?


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