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Author Question: Compare the speed of spiral density waves with the orbital speeds of stars in the visible part of ... (Read 27 times)

RODY.ELKHALIL

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on: Jul 27, 2018
Compare the speed of spiral density waves with the orbital speeds of stars in the visible part of the Galactic disk.
 
  What will be an ideal response?

Question 2

The two Voyager spacecraft carry a message from Earth, just in case an alien civilization ever runs across them.
 
  Indicate whether the statement is true or false


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bubulittle310@msn.cn

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

Spiral density waves move slower than the orbital speeds at the same distance from the center of a galaxy.

Answer to Question 2

TRUE


RODY.ELKHALIL

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

bblaney

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Reply 3 on: Yesterday
Excellent

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