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Author Question: Galaxies in all directions are observed to be streaming away from us as if we were in the center of ... (Read 29 times)

mynx

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on: Jul 27, 2018
Galaxies in all directions are observed to be streaming away from us as if we were in the center of the universe.
 
  Contrast this impression with the Cosmological Principle and explain why a simple-minded interpretation of the Hubble expansion is incorrect.

Question 2

Contrast a hypernova and a type II supernova.
 
  What will be an ideal response?


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scrocafella

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Reply #1 on: Jul 27, 2018
Answer to Question 1

If we are at the center of the universe that contradicts the cosmological principle which says that no point is in any way different from any other point. It is not that everything is moving away from us per sec, it is that everything is moving away from everything else. No matter where we might be, we would observe that everything moved away from us.

Answer to Question 2

A more massive star collapses to a black hole in a hypernova, with bi-polar jets of gamma rays. In a less massive type II event, only a neutron star is left.


mynx

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

scottmt

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Reply 3 on: Yesterday
Excellent

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