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Author Question: The occasional backward motion of the planets against the background of fixed stars is called _____. ... (Read 60 times)

kshipps

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on: Jul 27, 2018
The occasional backward motion of the planets against the background of fixed stars is called _____.
 
  A) anterograde motion
  B) rotation
  C) oscillation
  D) retrograde motion

Question 2

Isaac Newton concluded that a force from Earth had to act on the Moon because:
 
  A) some force is needed to pull the Moon away from Earth.
  B) some force is needed to keep the Moon in a straight-line motion.
  C) some force is needed to keep the Moon in motion in its orbit.
  D) some force is needed to accelerate the Moon toward Earth.


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EAN94

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

D

Answer to Question 2

D


kshipps

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

aliotak

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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