Question: A planet makes a circular orbit with period T around a star. If the planet were to orbit at the same distance around this star,

A planet makes a circular orbit with period T around a star. If the planet were to orbit at the same distance around this star, but the planet had three times as much mass, what would the new period (in terms of T) be:

(a) 3T,

(b) T√3,

(d) T/√13, or

(e) T/3?

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