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Author Question: Sirius is a star with spectral type A and Rigel is a star with spectral type B. What can we ... (Read 109 times)

jerry coleman

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on: Jul 27, 2018
Sirius is a star with spectral type A and Rigel is a star with spectral type B. What can we conclude?
 
  A) Sirius has a higher core temperature than Rigel.
  B) Sirius has a higher surface temperature than Rigel.
  C) Rigel has a higher surface temperature than Sirius.
  D) Rigel has a higher core temperature than Sirius.

Question 2

As with stars, binary galaxy pairs are useful in finding their total mass.
 
  Indicate whether the statement is true or false


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softEldritch

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

C

Answer to Question 2

TRUE


jerry coleman

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


softEldritch

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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