WHAT IS THE DISTANCE TRAVELLED BY LIGHT IN A VACCUM IN ONE TROPICAL YEAR?
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Light-year. The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres (9.46 x 1012 km) or 5.88 trillion miles (5.88 x 1012 mi).
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aproximately 9.5 trillion km
i think
i think
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