All Questions
3
questions
5
votes
3
answers
585
views
If a CMB photon traveled for 13.7 billion years to reach me, how far away was the source of that CMB photon when it first emitted it?
If a CMB photon traveled for 13.7 billion years (- 374,000 years) to reach me.
How far away was the source of that CMB photon when it first emitted it?
My attempt to solve this question was to use the ...
- 365
6
votes
1
answer
282
views
How long would it take to get to the Hyperion proto-supercluster?
Right now, we set a ship carrying no humans going to the Hyperion supercluster (redshift is $z=2.45$, so around $11$ billion light years from Earth) at a velocity of $c/2$ ($c$ being the speed of ...
- 63
4
votes
1
answer
144
views
Cosmology / Interpretation between credibility/confidence_level with bayesian/frequentist approaches
I try to understand the following article :
testing general relativity from curvature and energy contents at cosmological scale
I don't understand the title of figure 1 :
where it is indicated ...
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