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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 astronomical unit (150,000,000 km; 93,000,000 mi).

References

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

Further reading

External links

Template:Units of length used in Astronomy Template:SI units


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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Happy Pi Day (to the 36th digit)! This article is part of Project Maths, a All Birds project that aims to write comprehensive articles on each term related to mathematics.
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