If the Spiral Density Wave Were the Only Thing Producing

question 5

Multiple Choice

If the spiral density wave were the only thing producing spiral arms, it would be expected that

• A)all spiral arms would be gas and dust free.
• B)all galaxies would have only two smooth spiral arms.
• C)the Milky Way would show and irregular pattern of short arms .
• D)the Milky Way wouldn't have any spiral arms.
• E)the halo component of the Milky Way would show spiral arms as well.

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