What are the spiral arms of the Milky Way made of?
A. Older stars and comets
B. Younger stars and gaseous nebulae
C. Variable stars
D. Asteroids and comets
The spiral arms of the Milky Way made of: Younger stars and gaseous nebulae.
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Asked 7/18/2018 9:14:54 AM
Updated 1/17/2023 2:21:27 AM
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