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If you wanted to document the apparent retrograde motion of Mars, you would need to measure and record Mars's __________ over a period of __________.
If you wanted to document the apparent retrograde motion of Mars, you would need to measure and record Mars's position among the constellations over a period of several months.
Expert answered|yeswey|Points 2034|
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Asked 1/25/2013 5:02:50 PM
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