The Distance to the Andromeda Galaxy Is Estimated at About

question 21

Multiple Choice

The distance to the Andromeda Galaxy is estimated at about 2 × 10⁶ light years.A light year is the distance traveled by light in one year;if the speed of light is 3 × 10⁸ m/s,about how far is it from our galaxy to Andromeda? (1 year = 3.15 × 10⁷ s)

• A) 10 × 10¹⁵ m
• B) 1 × 10¹⁸ m
• C) 2 × 10²² m
• D) 6 × 10¹² m

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Definitions:

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