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Author Question: The Hertzsprung-Russell Diagram plots ________ against the spectral type or temperature. A) ... (Read 7 times)

cartlidgeashley

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on: Jul 27, 2018
The Hertzsprung-Russell Diagram plots ________ against the spectral type or temperature.
 
  A) distance
  B) luminosity or absolute magnitude
  C) brightness or apparent magnitude
  D) size or density
  E) mass

Question 2

Why would spiral galaxies be less common now than in the early universe?
 
  What will be an ideal response?


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kbennett34

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

B

Answer to Question 2

As galaxies collide they change. As large spiral galaxies collide, they merge into ellipticals. Over time, more and more collisions between large spirals reduce their overall number.


cartlidgeashley

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Reply 2 on: Jul 27, 2018
Gracias!

scottmt

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Reply 3 on: Yesterday
Wow, this really help

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