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Knowing an orbit's shape and the equal area rule, an astronomer can work out a planet's:
AMass at any point
BAge at any point
CSpeed at any point
DColour at any point
Answer & Solution
Correct answer: C. Speed at any point
1. The second law concerns motion along the ellipse.
2. Together they fix shape and pace.
3. They give the speed at any point.
_Source: OpenStax Astronomy 2e, Chapter 3, Orbits and Gravity._
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