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Top Questions

10 votes
2 answers
1k views

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

4 votes
1 answer
2k views

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

8 votes
1 answer
824 views

Binoculars 10x50 in light polluted place

5 votes
2 answers
838 views

What does "by an amount" mean here?

4 votes
1 answer
362 views

Virial theorem, contraction, and stars getting hotter

5 votes
1 answer
193 views

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

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?

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?

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?

2 votes
1 answer
58 views

What criteria determines whether stars are supernova type II candidates?

2 votes
0 answers
114 views

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

3 votes
0 answers
83 views

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

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)

2 votes
1 answer
59 views

Are asteroids 2012 PM35 and 2020 OG106 aliases?

1 vote
1 answer
45 views

Sky viewer from the moon

1 vote
0 answers
61 views

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

-3 votes
0 answers
52 views

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

3 votes
0 answers
47 views

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

2 votes
2 answers
56 views

What does "energy dumped into waves" mean?

1 vote
1 answer
31 views

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

1 vote
1 answer
24 views

Magnitude difference between companion in binary from mass difference in binaries

0 votes
1 answer
28 views

Recognize the celestial object in UMa

0 votes
1 answer
28 views

Strange spectral types in star catalogs

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?

1 vote
1 answer
24 views

Units in distance parallax relation

0 votes
0 answers
20 views

Time taken calculation to reach synodic degrees between planets

2 votes
0 answers
20 views

Mass resolution in cosmological simulations

1 vote
0 answers
17 views

The constellation you see when looking at Chicago from the space

1 vote
0 answers
16 views

Can this ppxf fit work?

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?


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