vale6maIlsea
vale6maIlsea
19-04-2016
Physics
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A light-year is a unit of
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savchave7928
savchave7928
19-04-2016
A unit of length used to express astronomical distances.
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AL2006
AL2006
19-04-2016
A light-year is a unit of length or distance.
It's defined as the distance that light (or any electromagnetic
wave) travels through vacuum in one Earth-year.
==> about 9,460,730,000,000,000 meters
==> about 5,878,620,000,000 miles
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