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Author Question: Which statement about extrasolar planets found to date is true? A) All are terrestrials, ... (Read 73 times)

khang

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on: Jul 27, 2018
Which statement about extrasolar planets found to date is true?
 
  A) All are terrestrials, comparable in size to Earth.
  B) All lie more than 2 AU from their star.
  C) Most have orbital periods of more than a year.
  D) Some are so close to their stars that their periods are just a few days.
  E) Few are found by Doppler shifts of their stars, due to their gravity.

Question 2

What are the minimum and maximum values for declination in the sky for both north and south?
 
  What will be an ideal response?


guyanai

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

D

Answer to Question 2

From the equator at 0 degrees, to +90 degrees for the north celestial pole, and down to -90 degrees for the south celestial pole.


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khang

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Reply #2 on: Jul 27, 2018
Thank you!


guyanai

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Reply #3 on: Jul 27, 2018
Always glad to help...


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