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d_e
  • Member for 5 years, 4 months
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17 votes
2 answers
3k views

On Mars, why are the seasons "strongly amplified" in the southern hemisphere and masked in the northern hemisphere?

14 votes
2 answers
2k views

How it is not possible to say if Titius–Bode law is a "coincidence" or not?

11 votes
1 answer
2k views

What are those stars that cross the galactic center?

11 votes
1 answer
1k views

How exactly was Giovanni Cassini able to measure the distance to Mars?

6 votes
2 answers
221 views

what is the resolution of the magnitude that is distinguishable to the naked eye?

6 votes
2 answers
771 views

What is the average angular distance between the Sun and the Moon?

4 votes
3 answers
1k views

How to calculate the nodal precession range of the Moon with respect to the celestial equator?

4 votes
1 answer
535 views

How the "precession of the ecliptic" can be distinguished from the "precession of the equator"?

4 votes
2 answers
253 views

nonagesimal in Kepler's parallax computation

3 votes
1 answer
64 views

How 3’ minute arc error in the Sun altitude might amount to 7’ minute arc displacement in Sun's longitude?

3 votes
0 answers
120 views

When Only 50% percent of the sky will be filled with stars?

3 votes
1 answer
166 views

Does the observed Perihelion precession of Mercury still deviate from prediction?

2 votes
1 answer
134 views

How to explain this elongation frequency diagram between the Sun and the Moon

1 vote
1 answer
166 views

Why Does Moon Evection formula use the mean position instead of the true position?

1 vote
1 answer
126 views

What is the "sunrise equation" for non-constant declination component?

1 vote
0 answers
39 views

When will be the next visible Supernova? [duplicate]