Suppose We Observe a Cepheid Variable in a Distant Galaxy

question 56

Multiple Choice

Suppose we observe a Cepheid variable in a distant galaxy. The Cepheid brightens and dims with a regular period of about 10 days. What can we learn from this observation?

• A) We can learn the distance to the galaxy.
• B) It will allow us to calculate the rotation rate of the galaxy.
• C) It will allow us to determine the mass of the galaxy.
• D) Under the rules of the International Astronomical Union, we will be entitled to naming rights for the galaxy.

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Definitions:

Believes In God

Refers to the conviction in the existence of a deity or deities.

Mystery

Something that is difficult or impossible to understand or explain; often a topic of intrigue or curiosity.

Binocular Vision

The ability to maintain visual focus on an object with both eyes, creating a single visual image and enabling depth perception.

Same Object

Referring to an item that is identical in nature, character, or function to another, often used in discussions about perception and cognition.