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Author Question: Collisions between galaxies: A) are much rarer than collisions between stars. B) can turn ... (Read 92 times)

Yi-Chen

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on: Jul 27, 2018
Collisions between galaxies:
 
  A) are much rarer than collisions between stars.
  B) can turn elliptical galaxies into spirals.
  C) cause large numbers of stars to collide and explode.
  D) cause the gas and dust clouds to collide, leading to rapid star formation.
  E) are the best explanation for gamma-ray burst events.

Question 2

Why are summers hotter than winters? Relate this to the Sun's position in the celestial sphere and the length of the days.
 
  What will be an ideal response?


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ttt030911

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

D

Answer to Question 2

The Sun is 47 degrees higher in the noon sky for northern hemisphere observers in June than in December, and also gives several extra hours of daylight as well.


Yi-Chen

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Reply #2 on: Jul 27, 2018
TY


ttt030911

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Reply #3 on: Jul 27, 2018
You're welcome


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