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taurus [48]
3 years ago
5

Our nearest galactic neighbor, Andromeda, is ~3 million light-years away. Keeping in mind the definition of a light-year, how lo

ng in seconds does it take light from Andromeda to reach Earth?
Geography
1 answer:
erik [133]3 years ago
3 0

Answer:

9.4608 × 10¹³ seconds.

Explanation:

Data provided:

Distance of Andromeda from Earth = 3 million light years

Now,

3 million light year means that the light will take 3 million years to reach the Earth

also,

in 1 year there are ( 365 × 24 × 60 × 60 ) =  31536000 seconds

therefore,

3 million years in seconds = 3 million × 31536000 seconds

= 3,000,000 × 31536000

= 9.4608 × 10¹³ seconds.

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