What Property of a Star's Spectral Lines Allows Astronomers to Measure

question 21

Multiple Choice

What property of a star's spectral lines allows astronomers to measure stellar masses?

• A) redshift
• B) width
• C) variability
• D) depth

---

Definitions:

Risk Lover

A person or entity that prefers to take risks, often in pursuit of higher rewards, rather than avoiding them.

Probability

A measure of the likelihood of a particular event or outcome occurring, expressed as a number between 0 and 1.

Expected Utility Maximizer

An individual who makes choices under uncertainty to maximize their expected level of satisfaction, based on the probabilities of different outcomes.

Von Neuman-Morgenstern

A theory in economics that provides an axiomatic basis for expected utility theory, which helps to explain choice under uncertainty.