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Astronomical unit
? TBD
Mean distance between Earth and the Sun
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The astronomical unit (symbol: au or AU) is a unit of length defined to be exactly equal to 149597870700 m. Historically, the astronomical unit was conceived as the average Earth-Sun distance (the average of Earth's aphelion and perihelion), before its modern redefinition in 2012.

Instance of
Unit of length
SI-accepted non-SI unit
UCUM derived unit
Non-SI units mentioned in the SI
Different from
AE
AU
African Union
Wikidata