All Questions
7
questions
5
votes
1
answer
232
views
Movement of stars over long periods of time
When the Great Pyramid was built, one long sloping tunnel was aimed at a particular star, which could be seen by a person at the bottom of that tunnel on just one night of the year. Today that star is ...
9
votes
2
answers
6k
views
Which star / galaxy is moving away from us the fastest?
I know that we have measured the rate a lot of stars and galaxies move away from us using the doppler shift, and I know that the further a star / galaxy is the faster they accelerate away from us due ...
- 259
1
vote
0
answers
15
views
Fast moving bright star with eliptic course, instant stop [duplicate]
Around 13 years ago I saw fast moving bright star with eliptic course which crossed half a sky in 1-2 sec and stopped instantly like it was a smashed like a bug, and didn't move for a while few ...
- 11
1
vote
0
answers
52
views
Almost unseeable light moving over nightsky. What is it? [duplicate]
Sometimes when I look up at the sky at night, I can see something moving. It’s so small that I barely can see it, but I can’t see it when I look directly at it. I need to look beside it to see it. It ...
- 11
4
votes
1
answer
205
views
In 31.5kyr, Epsilon Eridani and Luyten 726-8 will be < 1ly close; but how distant from the Solar system?
Greetings! Based on Wikipedia and more precisely this paper, it is said that, in about 31,500 years, the stars Epsilon Eridani and Luyten 726-8AB will "meet" at a very close distance (less than 1 ...
- 43
4
votes
2
answers
468
views
Are there good animations of the movement of proximate stars over long time periods?
After reading about Barnard's Star and how it's approaching us 140 km/sec, I'm curious if there are any visualizations of how the nearest stars to Sol will be moving over the next 100k years or so.
...
- 1,566
26
votes
2
answers
3k
views
How often do stars pass within 1 light year of the Sun?
Interstellar exchange of massive objects is difficult across several light years. But as the stars orbit the galaxy the distances between them change. I don't find data for neighbor star distances ...
- 11.4k