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Author Question: For the Pleiades, a fifty-million-year-old cluster, we find classes ________ and ________ already ... (Read 83 times)

bio_gurl

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on: Jul 27, 2018
For the Pleiades, a fifty-million-year-old cluster, we find classes ________ and ________ already leaving the main sequence, making the seven bright giants in the seven sisters.
 
  Fill in the blank(s) with correct word

Question 2

Where do most dust grains form?
 
  A) in molecular clouds
  B) in the winds of red giant stars
  C) in planetary nebulae
  D) in supernovae
  E) all of the above


kxciann

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

O; B

Answer to Question 2

B


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