How Do Astronomers Measure the Masses of Stars Directly

question 241

Multiple Choice

How do astronomers measure the masses of stars directly?

• A) by observing the star's brightness at different wavelengths (colors)
• B) by observing the motion of two stars in a binary star system
• C) by measuring the star's brightness, temperature, and distance
• D) by measuring the star's brightness and obtaining its radius using the H-R diagram

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Definitions:

Components in Series

A configuration where components are connected end-to-end in such a way that the failure of one component results in the failure of the entire system.

System Reliability

The probability that a system, including all individual components and processes, will perform its required functions without failure under stated conditions for a specified period of time.

Four-Component Product

A product that is made up of four distinct parts or elements, requiring a detailed product and process design.

Component Reliabilities

The probability that individual components of a system will perform their required functions for a specified period under stated conditions.