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Author Question: Most of the moons of Saturn have rocky, cratered surfaces, like Deimos and Phobos. Indicate ... (Read 117 times)

SO00

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on: Jul 27, 2018
Most of the moons of Saturn have rocky, cratered surfaces, like Deimos and Phobos.
 
  Indicate whether the statement is true or false

Question 2

Why is it thought that quasars probably spend only a fairly short time in their highly luminous phase?
 
  A) because there aren't many quasars around today
  B) because there aren't any quasars closer than about a redshift of 1
  C) because all quasars are at about the same epoch, narrowly defined in time
  D) because a black hole could not power a highly luminous quasar for more than a few million years
  E) because quasars are known to be the consumers of massive galaxies


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ryrychapman11

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

FALSE

Answer to Question 2

D


SO00

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


ryrychapman11

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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