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Dimension of light year​

Answer»

tion:Light-year, in astronomy, the DISTANCE traveled by light moving in a vacuum in the course of ONE year, at its accepted velocity of 299,792,458 metres per SECOND (186,282 miles per second). A light-year EQUALS about 9.46073 × 1012 km (5.87863 × 1012 miles), or 63,241 astronomical units.



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