Cepheid Stars Are Useful to Astronomers as Indicators of

question 44

Multiple Choice

Cepheid stars are useful to astronomers as indicators of

• A) white dwarf star behavior.
• B) distance,particularly to stars in our Galaxy and to nearby galaxies.
• C) stars with very high-speed motion.
• D) the mechanics of eclipsing variable stars.

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Definitions:

Visual Receptors

Cells located in the retina of the eye that are responsible for converting light into neural signals the brain can interpret.

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and functioning best in relatively bright light.

Dim Light

A level of illumination that is lower than what is considered bright, often creating a subdued or intimate atmosphere.

Human Retina

The light-sensitive layer at the back of the eye that contains cells (rods and cones) which convert light into neural signals for vision.