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Author Question: Galactic disks appear blue because: A) they contain no G, K, or M dwarfs. B) they contain only ... (Read 18 times)

neverstopbelieb

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on: Jul 27, 2018
Galactic disks appear blue because:
 
  A) they contain no G, K, or M dwarfs.
  B) they contain only blue reflection nebulae.
  C) dust obscures the longer, red, wavelengths.
  D) O and B blue giants are much brighter than G, K, or M dwarfs.
  E) dark matter gravitationally shifts all wavelengths towards the blue.

Question 2

Discovered by the spacecraft Galileo, Dactyl is a satellite of larger Ida.
 
  Indicate whether the statement is true or false


fur

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

D

Answer to Question 2

TRUE


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