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The distance from earth to the center of our galaxy is about 28,000 ly (1 ly...

The distance from earth to the center of our galaxy is about 28,000 ly (1 ly = 1 light year = 9.47 × 1015 m), as measured by an earth-based observer. A spaceship is to make this journey at a speed of 0.9990c. According to a clock on board the spaceship, how long will it take to make the trip? Express your answer in years. (1 yr is equal to 3.16 × 107 s.)

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