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Light-year

Light-year is length unit, symbol: [ly]. Definition of 1 light-year ≡ Distance light travels in vacuum in 365.25 days. . Compared to metre, light-year is bigger unit.

• 1 [ly] = (exactly) `9460730472580800` [m]

• 1 [m] = (exactly) `1/(9460730472580800)` [ly] = 1.0570008340246 × 10-16 [ly]

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[ly]
=? micrometre
=? millimetre
=? centimetre
=? metre
=? kilometre
=? foot (International)
=? inch (International)
=? line
=? mile (international)
=? point (PostScript)
=? yard (International)
=? zoll

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The International Astronomical Union and Astronomical Units. http://www.iau.org/public_pres...

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