TERMIUM Plus®

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LIGHT-YEAR [1 record]

Record 1 2015-02-20

English

Subject field(s)
  • Astronomy
  • Astrophysics and Cosmography
DEF

A unit of length in interstellar astronomy equal to the distance that light travels in one year in a vacuum or 5,878,000,000,000 miles.

CONT

Another unit of measurement employed in stellar distances is the "light year", or the distance light travels in one year. Light travels 186,000 miles every second ...

CONT

Estimated to be between 6,000 and 10,000 light-years away from the earth, the star [Eta Carinae] is one of the largest known, 150 times more massive than the sun.

French

Domaine(s)
  • Astronomie
  • Astrophysique et cosmographie
DEF

Unité de longueur équivalant à la distance parcourue en un an par la lumière dans le vide. Elle vaut environ 9,461 X 10¹² km [symbole : al].)

CONT

Le diamètre [de notre galaxie] est de l'ordre de 70 000 années-lumière.

OBS

année-lumière : Forme courante de année de lumière.

Spanish

Campo(s) temático(s)
  • Astronomía
  • Astrofísica y cosmografía
DEF

Unidad de distancia definida por el camino recorrido por la luz, en el vacío, durante un año.

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