Rektaszension
At Rektaszension α of a (latiinsk ascensio recta ‚lik apstiigen‘) as ian faan jo tau polaarkoordinaaten uun't ekwatooriaal koordinaatensüsteem faan a astronomii. Det ööder koordinaat as at Deklination.
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Rektaszension an deklination üüb't hemelskuugel
At rektaszension as tu fergliken mä't geograafisk lengde üüb a eerd. At deklination wiar do det geograafisk breetje.
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