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A spaceship travels at a constant speed from earth to a planet orbiting another star. When...

A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 11.76 years have elapsed on earth, and 7.17 years have elapsed on board the ship. How far away (in meters) is the planet, according to observers on earth? (c = 3.00 x 108 m/s)

Hint: you can enter the answer in terms of exponent i.e. 5.2e16.

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