Essay
Describe a scale model of the disk of the Milky Way using a scale in which 1 cm = 1000 light-years. Note that the diameter of the disk is approximately 100,000 light-years, the thickness of young stars is 500 light-years, and the thickness of the older stars is 4,000 light-years.
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In this model, the disk would be 100 cm ...View Answer
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