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ASTRONOMICAL UNIT [1 record]

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Alphabetical list of terms

Record 1 2003-10-23

English

Subject field(s)
  • Astronomy
  • Metrology and Units of Measure
  • Astrophysics and Cosmography
DEF

Unit equal to the mean distance of the earth to the sun, used to describe planetary distances.

OBS

A.U. is the abbreviation for a measure of length called the "astronomical unit" which is used by astronomers because the units of length employed on the Earth are all too short. 1 A.U. is equal to the average radius of the Earth's orbit, about 93,000,000 miles.

French

Domaine(s)
  • Astronomie
  • Unités de mesure et métrologie
  • Astrophysique et cosmographie
DEF

Unité de longueur dans le système solaire [qui] vaut 1,496.1013 cm (près de 150 millions de km).

Spanish

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