Which of the following is no longer considered valid? a. the ptolemaic system b. the copernican system
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Which of the following is no longer considered valid?
a. the ptolemaic system
b. the copernican system
c. Kepler’s laws of planetary motion
d. Newton’s law of gravity
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Ans A Ptolemic system is no longer valid Ptolemic system considers earth is the center of universe ...View the full answer
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