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Dictionary


so'lar cy'cle



Astron.
the variation of sunspots, prominences, flares, and other solar activity through an 11-year cycle. Also called so'lar activ'ity cy"cle. Cf. sunspot cycle.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

solar constantsolar day

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