SCIENCE|natural and applied sciences|space science
- solasbhliain Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Definition aonad faid sa spás, an fad a thaistealaíonn solas (nó aon tonn leictreamaighnéadach) i mbliain amháin Reference 'solasbhliain'. Hussey, M., Fréamh an Eolais, Coiscéim, Baile Átha Cliath, 2011
- Lichtjahr
- de
- Definition astronomische Längeneinheit entsprechend der von Licht in einem Jahr zurückgelegten Strecke Reference "Wikipedia > Lichtjahr, https://de.wikipedia.org/wiki/Lichtjahr (4.2.2018)"
- light-year | light year | lightyear
- en
- Definition unit of length used to express astronomical distances, equal to the distance that light travels in vacuum in one Julian year (365.25 days) Reference "COM-Terminology Coordination, based on: - Wikipedia > Light-year, https://en.wikipedia.org/wiki/Light-year [31.5.2017]- International Astronomical Union > IAU for the Public > Themes > Measuring the Universe, https://www.iau.org/public/themes/measuring/ [31.5.2017]"
- Comment "The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in nonspecialist and popular science publications. The unit usually used in professional astrometry is the parsec [ IATE:1412953 ].Reference: Wikipedia > Light-year, https://en.wikipedia.org/wiki/Light-year [31.5.2017]"
- année-lumière
- fr
- Definition unité de longueur, non normalisée, égale à la distance parcourue dans le vide par la lumière en un an (vaut environ 0,3 parsec) Reference Recueil de terminologie spatiale(ESA,1982)