Two Separate Pairs of Binary Stars Are Observed

Two separate pairs of binary stars are observed. The separation of the pairs is identical, but the orbital period of Pair X is 4 times the orbital period of Pair Y. How does the total mass of the stars in Pair X compare to the total mass of the stars in Pair Y?

A) Pair Y has a total mass 2 times greater than Pair X.
B) Pair Y has a total mass 16 times greater than Pair X.
C) Pair X has a total mass 16 times greater than Pair Y.
D) Pair X has a total mass 2 times greater than Pair Y.

Correct Answer:

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