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Author Question: Why are the halo stars distributed spherically instead of throughout the disk? What will be an ... (Read 31 times)

clmills979

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on: Jul 27, 2018
Why are the halo stars distributed spherically instead of throughout the disk?
 
  What will be an ideal response?

Question 2

Galaxies in all directions appear to be redshifted, as if rushing away from us in the center of the universe. How does the cosmological principle handle this problem?
 
  What will be an ideal response?


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jessofishing

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

They formed early, while the protogalaxy was spinning slowly and was roughly spherical. Over time, rotation flattened most of the material into a disk and formed the Population I stars later.

Answer to Question 2

It is not just us, but everyone, everywhere who witnesses the same cosmological redshift, as all space and time expand in the Big Bang. Since space itself is expanding, there is no preferred direction and no center to the universe.


clmills979

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

diana chang

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Reply 3 on: Yesterday
Wow, this really help

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