בטן הרבה לבקר how fast can we travel a light year צפון היסטורי גאווה
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SOLVED:Astronomy One light-year is defined by astronomers to be the distance that a beam of light will travel in 1 year (365 days). If the speed of light is 186,000 miles per
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Solved 1. Just as a light-year is the distance that light | Chegg.com
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