Why Is It Surprising That Spiral Arms Are Stable Structures

question 6

Multiple Choice

Why is it surprising that spiral arms are stable structures, lasting billions of years?

• A) Differential rotation should tear the arms apart.
• B) Gas and dust clouds should run out of material to make young stars.
• C) Supernova explosions should disrupt the arms.
• D) Globular clusters are continuously passing through the arms.
• E) Gravity should pull the arms down into the center of the galaxy.

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The sharing of information between people within and outside of an organization that is performed for the commercial benefit of the organization.

Culture

The shared values, beliefs, norms, and practices of a group of people that shape their behavior and understanding of the world.

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A condition or society in which various cultural groups maintain their unique cultural identities while coexisting with one another within a larger society.

Cultural Pluralism

A condition in which smaller groups within a larger society maintain their unique cultural identities, and their values and practices are accepted by the wider culture.