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Author Question: Hubble's galaxy classification diagram (the tuning fork) A) explains active galactic nuclei. B) ... (Read 87 times)

mynx

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on: Jul 27, 2018
Hubble's galaxy classification diagram (the tuning fork)
 
  A) explains active galactic nuclei.
  B) shows how galaxies evolve from one form to another.
  C) suggests the existence of black holes.
  D) relates galaxies according to their shapes, but not according to any evolutionary status.

Question 2

Which of the following best describes what we mean by a habitable world?
 
  A) a planet or moon that could support life, if any life happened to be on it
  B) a planet or moon with life
  C) a planet or moon that lies within its star's habitable zone
  D) a planet or moon on which humans could survive if we happened to go there


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micaelaswann

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

D

Answer to Question 2

A


mynx

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Reply #2 on: Jul 27, 2018
TY


micaelaswann

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Reply #3 on: Jul 27, 2018
You're welcome


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