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
Correct Answer:

Verified
Correct Answer:
Verified
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