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LightYear
is a unit of length.
更多信息
- To use
, you first need to load the Units Package using Needs["Units`"]. 
is equivalent to 9.46073×1015 Meter (SI units).- Convert[n LightYear, newunits] converts n LightYear to a form involving units newunits.
- One
is the distance light travels in a year in a vacuum. 
is typically abbreviated as ly.
