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Results tagged with cosmology
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user 15447
Questions about the origin, history, evolution and fate of the Universe.
26
votes
Accepted
What's the issue with Olbers' paradox?
Olber's paradox is - as you state - the phenomenon, that the night sky is dark, but would have to be bright as the sun if the universe was infinite and infinitely old. The unspoken assumption here is …
- 21.4k
3
votes
Why is the FLRW universe (general relativity solution(s)) sometimes called the 'FRW universe'?
Well, to quote wikipedia, it's a matter of personal and historical perspective whom to credit (most):
Depending on geographical or historical preferences, the set of the
four scientists – Alexander F …
- 21.4k
12
votes
How can a black hole have a charge, or be charged?
The answer is reasonably simple: (nearly) all matter consists of protons, neutrons and electrons, thus of either positively, or negatively charged particles or those with no charge.
The next step you …
- 21.4k
0
votes
Why is Earth 1/3 the age of the universe?
At least 40% of the field stars (thus outside globular clusters) seem to have planets, if not more.
Planets form around the protostar, thus at the same time as the stars. Assuming that the laws of phy …
- 21.4k
13
votes
Accepted
With 42 supernovae in 37 galaxies, how do we know SH0ES results is robust?
Lets read the actual publication, Adam G. Riess et al (2022) ApJL 934 L7 to understand what the authors did to account for these possible biases. Notably the authors of the paper write
The SH0ES prog …
- 21.4k