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Author Question: How do we know that galaxy clusters contain a lot of mass in the form of hot gas that fills spaces ... (Read 33 times)

yoooooman

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on: Jul 27, 2018
How do we know that galaxy clusters contain a lot of mass in the form of hot gas that fills spaces between individual galaxies?
 
  A) The hot gas shows up as bright pink in visible-light photos of galaxy clusters.
  B) We infer its existence by observing its gravitational effects on the galaxy motions.
  C) We detect this gas with X-ray telescopes.
  D) We can observe the frictional effects of the hot gas in slowing the speeds of galaxies in the clusters.

Question 2

Kepler relied heavily on the telescopic observations of Galileo in developing his laws of planetary motion.
 
  Indicate whether the statement is true or false


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laurnthompson

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

C

Answer to Question 2

FALSE


yoooooman

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

laurnthompson

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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