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A newly found body orbits with a semimajor axis of 50 astronomical units. Its orbital period is about:
A550 years
B750 years
C350 years
D150 years
Answer & Solution
Correct answer: C. 350 years
1. Cube 50 and take the square root.
2. That gives roughly 354.
3. The period is about 350 years.
_Source: OpenStax Astronomy 2e, Chapter 3, Orbits and Gravity._
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