All Questions
Tagged with observable-universe fate-of-universe
6
questions
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How can the universe be 13 billion years old, but objects are seen farther away than that? [duplicate]
I keep running into this paradox, and the answers I get seem to be the same and not satisfying.
Most sites say the universe is about 13 billion years old, but we can see objects farther away, like 50 ...
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8
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1
answer
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Is our universe stable or metastable?
I've been reading and thinking about this subject for some time, but I can't seem to find a clear answer.
After reading Q14:
Aspects of the Higgs boson suggest that our Universe is only
“...
- 437
4
votes
2
answers
324
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Light beam (1 photon) in the limited universe?
If our universe is not infinite, what happens with the light beam (or photon) when it will travel through the whole universe?
For example, observable universe according to wikipedia has diameter 93 ...
- 625
3
votes
1
answer
667
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Is there a physical limit to how far we can go?
Is there a physical limit to how far we can go? I am thinking there could be based on the following:
1: There are parts of the universe expanding faster than the speed of light that we will never be ...
- 4,381
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false to stable vacuum transition [closed]
if the universe transitioned from a meta-stable vacuum to a stable vacuum we assume a universal death scenario. However since it cannot propagate faster than the speed of light, from any particular ...
4
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1
answer
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How can the observable universe shrink in a Big Rip?
As far as I know, the Big Rip occurs when the scale factor reaches infinity in a finite time. This will only happen in a universe dominated by phantom energy (i.e. a universe with an equation of state ...
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