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Author Question: Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppose you observe a ... (Read 30 times)

ssal

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on: Jul 27, 2018
Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppose you observe a nearby star that is moving much faster than this (say, 300 km/s). Which of the following is a likely explanation for its high speed?
 
  A) It has been pushed to high speed by the shock wave from a nearby supernova.
  B) It is a very young star, recently formed.
  C) It is probably a halo star that is currently passing through the disk.
  D) It is a very high mass star.

Question 2

The brightest active galaxies are giant ellipticals.
 
  Indicate whether the statement is true or false


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mmpiza

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

C

Answer to Question 2

TRUE


ssal

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

aliotak

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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