The speed of light in vacuum is almost exactly 300,000 km/s or 186,282 miles per second.  How long does it take light to travel from Earth to Pluto?  How many times longer than that is the time light takes to travel from Earth to the Andromeda Galaxy?

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The speed of light in vacuum is almost exactly 300,000 km/s or 186,282 miles per second.  How long does it take light to travel from Earth to Pluto?  How many times longer than that is the time light takes to travel from Earth to the Andromeda Galaxy?

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