You have observed the wobble in the velocity curves of two otherwise identical stars. Star A has a period of 6 months and Star B has a period of 1 year. What can you say about these stars?

A) It is impossible to say anything about the planets orbiting these stars.
B) Star B must have a planet like Earth.
C) Star A's planet must be closer than Star B's planet.
D) Star A's planet is more massive than Star B's planet.


C

Physics & Space Science

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Star clusters have been observed within dark nebulae with:

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