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7 votes
1 answer
1k views

What can I see with 10x50 binoculars in bortle class 4?

5 votes
2 answers
3k views

Visibility of Planetary alignment of 6 planets on 3 June 2024 from Prague

3 votes
1 answer
85 views

Easy guideline for using JPL Horizons DE431 for planets in aphelion and perihelion from 11000 BC to 16000 AD?

7 votes
1 answer
258 views

Who first observed another planet rotating?

0 votes
0 answers
34 views

Project Analog Hypothetical Planet

0 votes
1 answer
2k views

Maximum and minimum masses and sizes of giant planets?

2 votes
1 answer
40 views

How to estimate perturbations from other planets in Apsidal Precession

1 vote
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67 views

How can I calculate the geocentric longitude of Pluto in a similar way to VSOP87's algorithm?

13 votes
3 answers
535 views

Did the Late Heavy Bombardment Period Happen Because of a Stellar System Collision?

22 votes
3 answers
8k views

Why wasn't the planet Uranus recognized by ancient cultures?

4 votes
1 answer
104 views

Formation of a non-Sol Oort cloud with high mass planets

1 vote
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45 views

Timelapse Video Of Motion of Mars?

3 votes
0 answers
170 views

How can Jupiter rotate faster at the equator than at the poles (in degrees per second)?

2 votes
0 answers
77 views

How can I calculate current position of planet in sky

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