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Author Question: Which of these variable stars would be classified as an RR Lyrae? A) a pulsar with a period of ... (Read 87 times)

khang

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on: Jul 27, 2018
Which of these variable stars would be classified as an RR Lyrae?
 
  A) a pulsar with a period of 0.14 seconds
  B) a K giant with a period of 14 days
  C) an M giant with a period of 140 days
  D) an F giant with a period of 14 hours
  E) a B supergiant with a period of 0.14 days

Question 2

What is unusual about the rotational (spin) and orbital periods of Venus?
 
  What will be an ideal response?


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Christopher

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

D

Answer to Question 2

Venus' day is actually longer than its year. It takes longer to spin once on its axis than to complete one orbit around the Sun.


khang

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

shewald78

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Reply 3 on: Yesterday
Excellent

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