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Author Question: Most active galactic nuclei are found at large distances from us, with relatively few nearby. What ... (Read 46 times)

JMatthes

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on: Jul 27, 2018
Most active galactic nuclei are found at large distances from us, with relatively few nearby. What does this imply?
 
  A) Supermassive black holes existed only when the universe was young, and no longer exist today.
  B) Active galactic nuclei can form only at large distances from the Milky Way.
  C) Active galactic nuclei exist tend to become less active as they age.
  D) The jets seen in many active galactic nuclei must cause them to move far away from us.

Question 2

From the 1970s to the present, the accepted value of H has almost doubled, so
 
  A) the age of the universe is twice as old as we originally believed.
  B) the age of the Universe is half what we believed.
  C) the Copernican principle is not valid beyond our solar system.
  D) the ages of the oldest globular clusters are invalid.
  E) the critical density must also be halved.


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skipfourms123

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

C

Answer to Question 2

B


JMatthes

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Reply #2 on: Jul 27, 2018
TY


skipfourms123

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


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