Concept information
Preferred term
Light year
Definition
- The distance that light travels in one year at about 300,000 km per second, i.e. 9.5 x 10^12 km. It is equal to about 63,000 astronomical units. (en)
Broader concept
- Distance measure (en)
Entry terms
- Light-year (en)
- Lightyear (en)
Editorial note
URI
http://astrothesaurus.org/uat/919
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