What is a light year?
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The distance traveled by the light in one year is called the light year.
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LIGHT YEAR :-
A light year is the distance that light travels in empty space in one year.
The speed of light is about 300,000 km per second (about 186,000 miles per second), then a light year is about 10 trillion kilometers (about 6 trillion miles).
Hope it helps you... ;-)
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