what is light year?
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A light year is the distance coved by light in a year
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The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres or 5.88 trillion miles. As defined by the International Astronomical Union, a light-year is the distance that light travels in vacuum in one Julian year.
Unit of: length
1 ly in...: is equal to
Metric (SI) units: 9.4607×1015 m; 9.4607 Pm
Imperial & US units: 5.8786×1012 mi
Unit system: astronomy units
Astronomical units: 63241 au; 0.3066 pc
Symbol: ly
Explanation:
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