Question:

Kepler modified?

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A. the Copernican system

B. Newton's law of Gravity

C. the Ptolemaic system

D. the theory of the tides

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2 ANSWERS


  1. The answer is A.  The copernican system, like earlier systems, used circular orbits since circles were thought to be perfect.  Kepler showed the orbits were ellipses, not circles.


  2. A
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