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Unite astronomique (ua)
Глоссарий по астрономии |
= 149,597,870 km; the average distance from the earth to the sun. 1 au is a long way -- at 100 miles per hour (160 kph) it would take over 100 years to go 1 au.
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Vallis, французский
Sinuous valley (plural: valles)
Umbra, французский
The dark central region of a sunspot.
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