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An astronomer states an orbit's size as the distance from the centre of the ellipse to one end. She is quoting the:
ASemicircle axis
BSemidiameter axis
CSemimajor axis
DSemiminor axis
Answer & Solution
Correct answer: C. Semimajor axis
1. It runs from the centre to one end.
2. It is used to state the size of an orbit.
3. It is the semimajor axis.
_Source: OpenStax Astronomy 2e, Chapter 3, Orbits and Gravity._
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