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Umbra
Глоссарий по астрономии |
The dark central region of a sunspot.
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Unite astronomique (ua), французский
= 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.
Trekkie, французский
(also "trekker") a devotee of the science fiction program star trek.
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