The Leading Explanation for the Existence of Spiral Arms Is

question 109

Multiple Choice

The leading explanation for the existence of spiral arms is:

• A)shock waves from cyclic supernovae explosions.
• B)shock waves from the quasar-like eruption of the Galactic core.
• C)passages of spiral density waves through the interstellar medium.
• D)passages of massive globular clusters through the Galactic plane.
• E)tidal streams of small galaxies being torn up by our monster Galaxy.

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Definitions:

Pollyanna Principle

The tendency for people to remember pleasant items more accurately than unpleasant ones.

Pleasant Events

Activities or occurrences that bring joy, enjoyment, or satisfaction to an individual.

Person Perception

The process by which individuals form judgments and impressions of others.

General Process

A series of actions or steps taken in order to achieve a particular end, applicable across various contexts or fields.