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Exercise 23

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The Cassini spacecraft is headed toward the planet Saturn at a speed of 30,000 
meters per second relative to Earth's position. 

(a) During a three year time period as calculated by a person on Earth, how much 
time will pass according to Cassini's onboard clock?

(b) When Cassini's distance to Saturn is measured by an observer on Earth to be 
exactly 3 million km, how far will that distance appear to be from Cassini?