To Determine the Sum of the Masses of a Visual

question 21

Multiple Choice

To determine the sum of the masses of a visual binary star system,we need to measure for the system the

• A) temperatures and periods of the stars.
• B) distance from us and the semimajor axis of the orbit of one star relative to the other.
• C) period and the semimajor axis.
• D) temperatures and the distance from us.

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