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Author Question: Explain individual galaxies or clusters of galaxies do not expand in size despite the overall ... (Read 83 times)

torybrooks

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on: Jul 27, 2018
Explain individual galaxies or clusters of galaxies do not expand in size despite the overall expansion of the universe implied by Hubble's Law.
 
  What will be an ideal response?

Question 2

What is believed to be the large-scale structure of the universe?
 
  What will be an ideal response?


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6ana001

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

The pull of gravity works to slow the expansion rate of the universe. Therefore, in dense regions such as galaxies and clusters of galaxies, gravity is able to overcome the expansion and keep these objects from expanding. However, on larger scales, where the average density is lower, gravity does not have as strong an effect, and therefore the expansion continues between clusters of galaxies.

Answer to Question 2

Space itself is believed to have a frothy bubble-like structure, with superclusters of galaxies forming along the surface of a bubble in a filamentary pattern. Large voids are found between the filaments.


torybrooks

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


6ana001

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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