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AU
(redirected from Astronomical Unit)

    Also found in: Dictionary/thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
AU
The two-character ISO 3166 country code for AUSTRALIA.
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The Kuiper belt extends outward from the orbit of Pluto to about 70 times the Earth-sun distance, which defines an astronomical unit (AU).
Outer limits: solar system at the fringe by Cowen, Ron / Science News
To make the millions of kilometers between the planets easier to visualize, scientists use a scale called astronomical unit (AU), where 1 AU equals the distance from Earth and Sun (about 149,600,000 kilometers).
Are we there yet? (Math Skills) by Science World
An order for 56 circuit card assemblies will be followed six months later-- too late to be added to the first production run-- by an order for one or two or three of the same item at a relatively astronomical unit price.
The case for the $435 hammer by Fairhall, James / Washington Monthly
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