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Author Question: Astronomers know the universe is expanding because: A) everything is moving away from us. B) all ... (Read 16 times)

rmenurse

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on: Jul 27, 2018
Astronomers know the universe is expanding because:
 
  A) everything is moving away from us.
  B) all stars are moving away from us.
  C) most galaxies are moving away from us.
  D) galaxies farther away are moving away from us faster.
  E) there is a cosmic microwave background.

Question 2

What makes the Crab Nebula supernova remnant unusual as a supernova remnant?
 
  A) It is the biggest supernova remnant visible.
  B) It is the remnant of a supernova that was observed in the 20th century.
  C) It is the nearest supernova remnant.
  D) It is the oldest supernova remnant known.
  E) It is the remnant of a supernova observed by humans.


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mmj22343

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

D

Answer to Question 2

E


rmenurse

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Reply 2 on: Jul 27, 2018
Gracias!

cpetit11

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Reply 3 on: Yesterday
Excellent

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