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Saturday, July 01, 2006


Light travels 186,283 miles (or 299,793 kilometers) per second. It could travel, for instance, 7 1/2 times around the Earth in one second. A "light-year" is the distance light travels in a year, and similarly we can call the distance light travels in a second a "light second,"
Distance in light times
Moon to Earth 1.28 light-seconds
Sun to Earth 8.3 light-minutes
Sun to Jupiter 43.27 light-minutes
Sun to Pluto 5 1/2 light-hours
Sun to Proxima Centauri 4.22 light-years
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