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Time journey

A spacecraft, traveling at a typical attainable speed of about 25,000 kilometers per hour, leaves Earth and travels toward the closest star system to Earth, the Alpha Centauri system. The time for journey would be about how many years?

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The Alpha Centauri System is composed of 3 stars. The closest, Proxima Centauri, is about 4.2 light years away, but the system as a whole is 4.3 light years ...