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Also abbreviated AU. A unit of distance measurement equal to the semimajor axis of the Earth's elliptical orbit, equivalent to the average of the maximum and minimum distances between Earth and the Sun.[1]

1 AU is equal to 92,956,000 m (92,956 km).


  1. ^ Rees, Martin (ed.) (2008). Universe: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 9780756636708. 

4 Milky Way (ELitU)-blank This article is part of Project Astronomy, a All Birds project that aims to write comprehensive articles on each term related to astronomy.

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