If You Found an Exoplanet Whose Mass Was the Same

question 29

Multiple Choice

If you found an exoplanet whose mass was the same as Jupiter's, but the planet orbited its star with a period of 2 years and a semimajor axis of 1 AU, what would be the mass of its star? For reference, Jupiter has a semimajor axis of 5.4 AU and an orbital period of 12 years.

• A) 0.25 M_Sun
• B) 0.5 M_Sun
• C) 2.0 M_Sun
• D) 1.5 M_Sun
• E) 4.0 M_Sun

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