File:12lightyears.gif · Wikimedia Commons · See Wikimedia Commons
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Sign in to saveAlso known as ly, light year, lightyear, l.y., light-years, lightyears, light years
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OverviewAI-generated
A light-year is a unit of length used in astronomy. It is defined by specific conversions to standard units. One light-year equals 9460730472580800 in one standard measure and 372469718092929000 in another. The term is also referred to as Lichtjahr in German-language physics lexicons.
The concept is documented in various reference works. It appears in the Lexikon der Physik, which contains 22573 characters. The entry is grounded in external sources and is categorized under "Light-year" on Commons. The subject is referenced by 10,526 other encyclopedia articles, indicating its widespread use in scientific literature.
Synthesized by Vinony from 9 facts across 3 sources: Wikidata, Firecrawl, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.
Key facts
- Unit.name
- light-year
- Unit.standard
- astronomy units
- Unit.quantity
- length
- Unit.symbol
- ly
- Unit.units1
- metric (SI) units
- Unit.units2
- imperial and US units
- Unit.units3
- astronomical units
- Unit.caption
- Map showing stars and star systems lying within 12.5 light-years of the Sun
- Unit.image
- 300px
via Wikipedia infobox
Described at
Lichtjahr - Lexikon der Physik
Lichtjahr, Einheitenzeichen Lj, in der Astronomie übliche Einheit für Entfernungen. 1 Lichtjahr ist die Entfernung, die ein Lichtsignal wä…
spektrum.de →Link to a page describing this subject · 22,573 chars · not written by Vinony
Wikidata facts
- Image
- 1e16m comparison 10 light years sirius.png
Show 8 more facts
- unit symbol
- a.l.
- measured physical quantity
- length
- conversion to SI unit
- 9460730472580800
- conversion to standard unit
- 63240
- Wikidata SPARQL query equivalent
- wd:Q531 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
- described at URL
- www.spektrum.de/lexikon/physik/lichtjahr/9014
- Commons category
- Light-year
Sources (6)
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Gallery (2)
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