Multiple Choice
An astronomer is observing a binary system with two stars of masses M1 and M2. She determines a, the semimajor axis (also the average distance between the stars) and P, the period of their motion. Using this information in Kepler's third law she can calculate
A) M1 or M2 but not both.
B) M1/M2.
C) M1 + M2.
D) both M1 and M2.
Correct Answer:

Verified
Correct Answer:
Verified
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