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Author Question: Explain why galaxy-galaxy interactions are far more common than star-star interactions. What will ... (Read 61 times)

robinn137

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on: Jul 27, 2018
Explain why galaxy-galaxy interactions are far more common than star-star interactions.
 
  What will be an ideal response?

Question 2

Harlow Shapley mapped the Milky Way using the period-luminosity relationship for RR Lyrae stars.
 
  Indicate whether the statement is true or false


popopong

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

Galaxies are much closer together, relative to their size, than stars are. If the Sun were made the size of a grapefruit in New York, the nearest star would be on the other side of the continent. However, if the Milky Way (or any other galaxy) were made the size of a grapefruit, there would likely be another galaxy within a few feet of it. Thus, galaxy interactions are far more common than star-star interactions and must be taken into account when considering galaxy evolution.

Answer to Question 2

TRUE


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