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Additional
astronomical units of length
English Wikipedia - The Free Encyclopedia
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Astronomical system of units
The
astronomical system of units
, formally called the
IAU (1976) System of Astronomical Constants
, is a
system of measurement
developed for use in
astronomy
. It was adopted by the
International Astronomical Union
(IAU) in 1976, and has been significantly updated in 1994 and 2009 (see
astronomical constant
).
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