Answers

2016-05-07T13:17:45+05:30
A unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 million million miles) is known as a light year.
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2016-05-07T14:23:12+05:30
Light year is the distance travelled by light in one year . it's value is 9.46×10^15 metres
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