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Top Questions

-1 votes
0 answers
19 views

Meteorite or earth rock?

-1 votes
0 answers
23 views

Why isn't Epsilon Indi in HabCat

0 votes
1 answer
119 views

Why isn't Tau Ceti in the HabCat?

-1 votes
2 answers
81 views

Are Old Methusalah-type Stars in Faraway Galaxies?

5 votes
4 answers
637 views

Cepheids/supernova vs redshift (for estimating distances)

2 votes
1 answer
135 views

Universe expansion not accelerating?

1 vote
2 answers
105 views

In Which Locations Would It Be Possible To Have 4 “Constant” Constellations?

4 votes
0 answers
59 views

What is the role of the mercury-filled tubes in the occulting mechanism on Zeiss planetarium projectors

6 votes
2 answers
771 views

Find Extreme UV data source for the Sun

2 votes
1 answer
88 views

Could cometary non-gravitational acceleration be linked to surface cohesion transitions?

1 vote
2 answers
145 views

Help on calculating the sun's horizontal coordinates

1 vote
2 answers
3k views

Why the moon is blinding me right now?

1 vote
2 answers
88 views

Anisotropic to isotropic term ratio of the radiation field in the LTE plane parallel atmosphere approximation - Choudhuri's textbook

0 votes
0 answers
78 views

Can a black hole be opened by other black holes? [duplicate]

0 votes
2 answers
155 views

When we look towards the galactic centre is the plane of the sky perpendicular to galactic plane?

1 vote
2 answers
191 views

Assuming they exist, what would be the strongest observational evidence of quark stars?

1 vote
1 answer
66 views

How would one take a simulated Gaussian function absorption line and match it to a given spectrograph resolution?

0 votes
0 answers
40 views

Light Curve to SED - ZTF

-1 votes
2 answers
203 views

What is the cutoff between a rocky planet and a gas giant/ ice giant [duplicate]

6 votes
1 answer
216 views

Could an exoplanet's atmosphere have significant quantities of heavy noble gases?

6 votes
2 answers
1k views

Interstellar Dust properties

8 votes
3 answers
1k views

Why do neutron stars collide instead of just revolving around each other like planets revolve around the Sun?

1 vote
1 answer
335 views

How come the universe isn't a black hole?

3 votes
2 answers
345 views

By convention, when observing an exoplanet, is the observer's line of sight (on Earth) perpendicular to the plane of sky?

1 vote
1 answer
112 views

Why are aurora viewed from latitudes closer to the equator redder compared to aurorae viewed from more polar latitudes, which are usually green?

6 votes
4 answers
2k views

Would it be possible for a moon to be impacted, making it spiral into the planet? [duplicate]

2 votes
3 answers
1k views

Calculation of Julian day is off for negative dates

8 votes
1 answer
1k views

How do neutron/white dwarf stars get close enough to merge?

0 votes
1 answer
133 views

Require sine waves of lunar motion from 1851 to 2025 fitting to earth phenomena for modeling purposes

47 votes
2 answers
51k views

How does a neutron star collapse into a black hole?

3 votes
1 answer
581 views

What is the thickness of black holes event horizon?

7 votes
2 answers
3k views

Why aren't there eclipses every month when the moon's orbit is aligned with the ecliptic as a result of lunar precession?

0 votes
1 answer
193 views

Flat curvature and decelerated expansion in wCDM models

3 votes
1 answer
282 views

Calculation of twilight sky surface brightness based on object's apparent magnitude

0 votes
1 answer
80 views

What is this time dilation adjustment that has to be done for high-z objects? [duplicate]

4 votes
2 answers
364 views

Why is Io's volcanism chemically so different from Earth's?

9 votes
1 answer
2k views

Where are the foci of Earth's orbit?

0 votes
1 answer
155 views

Detecting the Extended Nature of objects via Orbital Dynamics?

4 votes
1 answer
2k views

What are the so called clouds of dust and gas made of?

7 votes
1 answer
302 views

How could a new cosmological model solve the hubble tension?

4 votes
0 answers
114 views

What is meant by the 'King core radius'?

5 votes
3 answers
1k views

Why aren't there green stars? [duplicate]

1 vote
1 answer
313 views

Distance Moon-Earth

0 votes
1 answer
142 views

How can I calculate the length of a solar eclipse on a gas giant's moon?

3 votes
2 answers
629 views

Could a moon be passed from one planet's orbit to another?


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