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User123
  • Member for 3 years, 5 months
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  • The edge of the Universe
31 votes
Accepted

Why does the solar analemma have a strange shape on Jupiter?

22 votes
Accepted

If we replaced the Moon with Ceres, how close would Ceres have to orbit to cause the same tides?

15 votes
Accepted

How can a brown dwarf be more massive than a star?

9 votes
Accepted

How to calculate the altitude of a star given the hour angle, declination, and latitude?

8 votes
Accepted

Spotting the booster rocket of the Chinese space station?

8 votes

Why is the equinoxes only 2 days and not more?

6 votes

Has the Earth's wobble around the Earth-Moon barycenter ever been observed by a spacecraft?

6 votes
Accepted

How many meteorites have been found some place other than Earth? Where is an authoritative list maintained?

6 votes
Accepted

Confusion when calculating the length of the day

6 votes
Accepted

Can you subtract magnitude of constant source to get magnitude of variable source?

6 votes
Accepted

How exactly did JWST take a "selfie" of its own primary mirror, and what is the real purpose of this capability?

5 votes

Angle the Sun makes with the horizon during sunset

5 votes

How are we identifying chemicals in space?

4 votes

Approximate spectral type and luminosity given apparent magnitude and distance

4 votes

Will we ever be able to see the surface of exoplanets directly?

4 votes
Accepted

I'm considering buying a telescope, which type should I choose?

3 votes

What is the rate of change by day for a given right ascension?

3 votes

Are there only $10^{83}$ atoms in the universe?

3 votes

How to solve numerical problems based on diurnal parallax method (formulas, examples and calculations)?

3 votes

What are the differences between astronomy and cosmology?

3 votes
Accepted

In which countries are there organised Messier Marathons?

3 votes

Can I see Jupiter, Mars and Saturn through the National Geographic 76/350 Dobsonian Telescope?

3 votes

Why was Pluto declassified as a planet?

3 votes

How to find the moons maximum culmination at a location

3 votes

Can we visually perceive exoplanet transits with amateur telescopes?

3 votes
Accepted

Usefulness of the hour angle (HA)

3 votes

Which binocular should I buy to be able to see Saturn and its rings?

3 votes
Accepted

Why do some pulsar planets have designations with a capital letter at the end?

2 votes

Potential paradox with the Big Rip and the Multiverse?

2 votes

The movement of the moon