What Is It That Makes the Study of the Structure

question 32

Multiple Choice

What is it that makes the study of the structure of the Milky Way Galaxy more difficult than that of much more distant spiral galaxies?

• A) The galactic center is visible only from the southern hemisphere, where, until recently, no major telescopes were available for the study of galactic structure.
• B) The Milky Way appears to be unique, with a structure quite unlike any other galaxy.
• C) The Sun is within the Galaxy, and its motion confuses the interpretation of the motion of other parts of the Galaxy.
• D) Most of the Milky Way is hidden behind dense gas and dust clouds in the galactic plane.

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Definitions:

Personality Test

A questionnaire or other standardized instrument designed to reveal aspects of an individual's character or psychological makeup.

Behavioral Activation System

A psychological concept referring to the brain system that regulates pursuit of rewards, motivating approach behaviors.

Gray's Reinforcement Sensitivity Theory

A theory that suggests differences in an individual's sensitivity to reward and punishment motivate differences in personality, behavior, and psychopathology.

Basis of Personality

The underlying factors or elements that dynamically shape an individual's character and behavior.