How long does it take if you travel at the speed of light to travel through the gallaxy?
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It would take 100,000 years to cross the Milky Way at the speed of light but it is impossible to reach that speed. If someone could travel at 99% the speed of light it would take about 101,000 years on earth to watch that travel but for the person on the spaceship it will last only 14,000 years.
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I think is is 70km/second is the speed of light to travel through the galaxy
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