The distance to the Andromeda Galaxy is estimated at about 2 × 10^6 light years. A light year is the distance traveled by light in one year; if the speed of light is 3 × 10^8 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 × 10^7 s)
a. 10 × 10^15 m
c. 2 × 10^22 m
b. 1 × 10^18 m
d. 6 × 10^12 m
C
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