What Important Role Do Cepheid Variables Stars Have in Astronomy

question 47

Multiple Choice

What important role do Cepheid variables stars have in astronomy?

• A) distance measurements to galaxies
• B) determination of stellar luminosities
• C) determination of speeds of stars in galactic arms from the Doppler shift of their spectra
• D) keeping of accurate time

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Definitions:

Social Value Orientation

An individual's preferences when allocating resources between oneself and others, which can influence behavior in social situations.

Competitive

A characteristic of entities that strive against each other to achieve a goal, such as winning a game or dominating a market.

Altruistic

Showing selfless concern for the well-being of others; behaviors or actions motivated by the desire to help without expecting anything in return.

Neural Activity

The functioning of neurons in the brain, including how they transmit signals through electrical and chemical processes.