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MCQIntermediateGravitation, Orbits & Dynamics
USAAAO — 2016 First Round
Question 15
On March 3, 2012, Mars experienced retrograde motion. The configuration of the Sun, Mars, and Earth that led to retrograde motion repeats periodically. Given that Mars orbits the Sun once every 1.88 years, on which of these dates would you expect Mars to exhibit retrograde motion again?
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