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Author Question: A major surprise from space exploration is that ________ exists at the poles of both Mercury and our ... (Read 407 times)

stephzh

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on: Jul 27, 2018
A major surprise from space exploration is that ________ exists at the poles of both Mercury and our Moon.
 
  Fill in the blank(s) with correct word

Question 2

How does Kepler's First Law refine the Copernican model greatly?
 
  What will be an ideal response?


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fdliggud

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

ice

Answer to Question 2

Copernicus, like the Greeks, thought all orbits were circular. But when Kepler used elliptical orbits, particularly with Mars and Mercury, the theory fit the actual observations of planetary motion much better than did the old Ptolemaic one.


stephzh

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

amandalm

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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