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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?

0 votes
0 answers
20 views

Time taken calculation to reach synodic degrees between planets

7 votes
3 answers
662 views

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

3 votes
2 answers
473 views

Is this scaling of JWST halo reasonably correct

4 votes
3 answers
113 views

Orbital terminology for satellites relative to one another

27 votes
5 answers
6k views

Can a planet with no atmosphere be orbited at extremely low altitudes?

0 votes
1 answer
53 views

Calculate how many days left for synodic period from particular planet

15 votes
3 answers
6k views

What is the **actual** average distance of the Moon from Earth?

1 vote
3 answers
231 views

Is there a Lagrange point between the earth and the moon?

9 votes
3 answers
1k views

How time-symmetric is orbital mechanics?

-3 votes
1 answer
109 views

Angular velocity of planets around Earth, and Sun

5 votes
4 answers
2k views

Do changes in the orbit of the Earth contribute to global warming?

1 vote
2 answers
129 views

Comet Bernardinelli-Bernstein; could it be a "planet-killer" and what could prevent it from getting close to us?

7 votes
3 answers
123 views

Is there a limit to how many objects can orbit eachother in a chain?

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