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Tresset [83]
3 years ago
11

The andromeda galaxy is located approximately 2.5 million light years from earth. Why is the light that reaches earth 2.5 millio

n years old?
Social Studies
1 answer:
yawa3891 [41]3 years ago
7 0
1 ly is a distance, defined as the distance travelled by light in a year. hence 2.5 mn lys away means it takes 2.5mn years for light to reach earth b/c light travels a distance of 1 light year in a year

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Answer:

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