Two Stars Orbit Their Common Center of Mass on Circular

question 68

Multiple Choice

Two stars orbit their common center of mass on circular orbits.Star A is four times more massive than star B.How do their orbital periods compare to each other?

• A) Star A has a longer orbital period than star B.
• B) Star B has a longer orbital period than star A.
• C) They are the same.
• D) The orbital periods cannot be determined without knowing their initial velocities.

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