Cepheid Variables Are Useful in Measuring the Distance to ____

question 2

Multiple Choice

Cepheid variables are useful in measuring the distance to ____.

• A) globular clusters and dwarf galaxies around the Milky way, but nothing farther
• B) globular clusters and the Andromeda Galaxy, but not more distant objects
• C) galaxies that are within 30 megaparsecs, a relatively short distance
• D) galaxies that are moderately far away, up to about 500 megaparsecs
• E) galaxies and galactic clusters within a gigaparsec of the Milky Way

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Definitions:

Serotonin

A neurotransmitter that has a significant impact on mood, emotion, and sleep.

GABA

Gamma-Aminobutyric Acid, a neurotransmitter in the brain that inhibits or reduces the activity of neurons.

Sex Hormones

Chemical substances produced by the body that regulate sexual functions and characteristics, including estrogen, progesterone, and testosterone.

Gonads

Glands responsible for producing sex hormones and gametes, playing a crucial role in reproductive health and behavior.