Astronomical unit

Astronomical unit

Jesse Russell Ronald Cohn

     

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ISBN: 978-5-5094-6628-1

High Quality Content by WIKIPEDIA articles! An astronomical unit (abbreviated as AU, au, a.u., or ua) is a unit of length now defined as 149,597,870,700 metres (92,955,807.273 mi) exactly, or roughly the mean Earth–Sun distance.

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