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Author Question: An astronomical unit (AU) is equal to the average distance from the Earth to the sun, about 92.9 ... (Read 95 times)

lbcchick

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on: Jul 27, 2018
An astronomical unit (AU) is equal to the average distance from the Earth to the sun, about 92.9  106 mi. A parsec (pc) is the distance at which 1 AU would subtend an angle of 1 second of arc. How many miles are there in a parsec?
 
  What will be an ideal response?

Question 2

Kepler's discovery that T2 /r3 = K applies
 
  A) to orbits where K is a universal constant.
  B) only to circular orbits.
  C) to lunar motion provided K is the same for planetary motion.
  D) to elliptical orbits where r is the average distance.


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Anton

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

1.92  1013 miles

Answer to Question 2

D


lbcchick

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

abro1885

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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