user avatar
user avatar
user avatar
Swike
  • Member for 3 years, 1 month
  • Last seen more than a month ago
97 votes
1 answer
17k views

How can there be 1,000 stellar ancestors before our Sun?

  • 1,081
59 votes
7 answers
38k views

How many planets are there in this solar system?

  • 1,640
29 votes
3 answers
3k views

Why can't we observe the Oort cloud with a telescope?

  • 6,104
28 votes
1 answer
5k views

How is it possible that we haven't discovered anything in the Oort cloud yet?

  • 16.8k
18 votes
3 answers
2k views

How does a gravity slingshot actually work?

  • 726
14 votes
2 answers
3k views

Why not send a Gaia-like mission to Mars?

  • 16.8k
10 votes
5 answers
2k views

Whats the farthest distance a spacecraft has been detected (except by radio)

5 votes
1 answer
255 views

Is there a verification of the solar system barycenter as it is theoretically determined?

  • 153
5 votes
1 answer
196 views

What was the nature of the signal received from the direction of HD164595?

  • 599
1 vote
1 answer
178 views

Did comets 266P/Christensen or P/2008 Y2 (Gibbs) cause the Wow! signal?

  • 152