Concept information
Preferred term
Astronomical unit
Definition
- A unit of length equal to 149,597,870,700 m exactly, with symbol 'au' (re-definition at the International Astronomical Union's 28th General Assembly in Beijing, China, August 20-31). The astronomical unit equals 1.5813 x 10^-5 light-years and 4.8481 x 10^-6 parsecs. (en)
Broader concept
- Distance measure (en)
Entry terms
- au (en)
- AU (en)
Editorial note
URI
http://astrothesaurus.org/uat/95
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