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staedtler staedtler
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7 years ago
The stellar components of the Galaxy that act as tracers for the mapping of spiral arm structure in the Milky Way are
A)   bright, population I stars and emission nebulae surrounding them.
B)   globular clusters.
C)   supernova explosions since they are very luminous and can be seen through considerable dust and gas.
D)   old, red giant stars and white dwarfs.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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discovererdiscoverer
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