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Author Question: Regions of compression that move at their own speed in the disk and are outlined by the spiral arms ... (Read 25 times)

rmenurse

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on: Jul 27, 2018
Regions of compression that move at their own speed in the disk and are outlined by the spiral arms are _____________.
 
  Fill in the blank(s) with correct word

Question 2

The youngest stars in the Orion Nebula and other star-forming regions also show
 
  a. circumstellar disks.
  b. jets.
  c. circumstellar disks and jets.


smrerig

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

density waves

Answer to Question 2

c


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