Question: (a) How much time does it take light to travel from the moon to the earth, a distance of 384,000 km? (b) Light from the

(a) How much time does it take light to travel from the moon to the earth, a distance of 384,000 km?
(b) Light from the star Sirius takes 8.61 years to reach the earth. What is the distance from earth to Sirius in kilometers?

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