What Is the Distribution of Stars in the Spiral Arms

question 152

Multiple Choice

What is the distribution of stars in the spiral arms of a typical spiral galaxy?

• A) The density of stars in the arms is far higher than the density of stars between the arms.
• B) Far fewer but brighter stars exist in the arms, while many more fainter stars exist between the arms.
• C) All the stars of a spiral galaxy are in the arms; there are none at all between the arms.
• D) The density of stars is relatively uniform in the disk of the galaxy but is slightly higher within the arms than between them.

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