astronomical_unit has definitions from the field of astronomy
1
[ noun ] (astronomy) a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers)

Synonyms

AU

Used in print

(J. F. Vedder, "Micrometeorites", in Francis S. J...)

At one astronomical_unit from the sun ( the Earth 's distance ) the dust orbits are probably nearly circular .

Related terms

astronomy_unit

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