Asked by Crissy XD

Explain why Hubble's observation of red shift in light from distant galaxies led him to the discovery that the universe is expanding.

Answers

Answered by drwls
That is how you get a red shift: by having the light source move away from the observer. The only other source of red shifts is increasingly high gravitational fields, but there is no evidence of that
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions