If Astronomers Want to Measure the Mass of a Star

question 162

Multiple Choice

If astronomers want to measure the mass of a star or a planet, they usually rely on the orbital motion of a satellite or binary companion. Which of these is the basis for a mass measurement of a solitary mass?

• A) time dilation
• B) length contraction
• C) gravitational redshift
• D) geodesics

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Definitions:

Enlarging

The process of increasing the scope, duties, or responsibilities of a job to provide greater variety and challenge.

Authority

The legitimate power or right to give orders, make decisions, and enforce obedience in a specific context or organization.

Power

The ability to influence another person.

Agent

An individual or entity that acts on behalf of another person or group, often in a negotiation or transaction.