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Few People Today Know That the Milky Way Is a Spiral

Question 72

Multiple Choice

Few people today know that the Milky Way is a spiral arm of our galaxy that contains a dense cluster of stars. In the past, it appeared not as individual points of light, but as a splash of light across the night sky. Why is it no longer visible this way?


A) the greenhouse effect
B) light pollution
C) urban sprawl
D) air pollution

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