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Author Question: In a visual binary system with circular orbits, if in 20 years the two stars' position angles have ... (Read 142 times)

OSWALD

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on: Jul 27, 2018
In a visual binary system with circular orbits, if in 20 years the two stars' position angles have shifted by 30 degrees, the pair's period must be
 
  A) 60 years.
  B) 90 years.
  C) 120 years.
  D) 240 years.
  E) 360 years.

Question 2

The habitable zone is largest for:
 
  A) brown dwarfs.
  B) red dwarfs.
  C) white dwarfs.
  D) red giants.
  E) blue giants.


Liamb2179

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

D

Answer to Question 2

E


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