user avatar
user avatar
user avatar
User123
  • Member for 3 years, 4 months
  • Last seen more than a week ago
  • The edge of the Universe
23 votes
3 answers
5k views

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

  • 1,538
8 votes
1 answer
1k views

What are the stages in the life of a universe?

  • 181
5 votes
2 answers
139 views

Can the transit of satellite in front of Sun be visible in 10-inch telescope?

5 votes
2 answers
691 views

Where is the North of the Universe

  • 2,835
5 votes
0 answers
121 views

What are some good books/online resources for astronomy problem sets?

  • 129
3 votes
1 answer
213 views

Approximate spectral type and luminosity given apparent magnitude and distance

2 votes
1 answer
169 views

How do I find out when a constellation reached its zenith?

1 vote
2 answers
397 views

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

  • 31
1 vote
1 answer
2k views

How to calculate declination of Moon?

  • 2,835
0 votes
1 answer
101 views

Could a star become a planet?

-1 votes
1 answer
96 views

What are the things, the hobby astronomers observe? [closed]

  • 2,835