Light Year

Light travels at the rate of 1,86,000 miles (or 3,00,000 km) per second. The distance traversed by the light in one year is known as light year.
light year = 3,00,000 x 60 x 60 x 24 x 365.25 km.
So, one light year = 9.46 x 1012 km.
i.e. 9,460 billion  kilometres or 5,880 billion miles.

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