All Questions
4
questions
3
votes
2
answers
120
views
Why don't we see galaxies going back in time?
Galaxies 4,200 megaparsecs away will travel faster than the speed of light away from each other, so why don't we see those galaxies as Going back in time up to the moment of the big bang?
- 79
1
vote
0
answers
152
views
Is the observable universe an absolute? [closed]
A short summary of a question difficult to easily describe:
Assume objects from the begining of the universe are at a fixed distance at T equals 0 when the universe is created. These objects become ...
- 101
0
votes
2
answers
138
views
Light speed after the Big Bang
We know that immediately after the Big Bang space was opaque to light. As space expanded, light could travel. However I would think that as space expanded at some de sites the light would be much ...
- 1
4
votes
5
answers
2k
views
Does the expansion of the universe soon after the Big Bang affect the amount of time that light takes to reach us?
If faster than light travel is impossible, how is it that light emitted from matter so close together in the time soon after the Big Bang is only now just reaching us? I would assume that there would ...
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