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Solar cycle primer

(PhysOrg.com) -- Telescopes spotted the first blemish on the sun in 1611. While the sun had long been thought—at least in the Western world—to be an unchanging, "perfect" orb, sky-watchers observed ...

Oct 28, 2011 4.1 / 5 (10) 22 | with audio podcast

List of search results for maunder minimum