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searching for Letters on Sunspots 3 found (26 total)

Sunspot drawing (746 words) [view diff] case mismatch in snippet view article find links to article

prediction of coronal mass ejection. In 1612, Galileo Galilei was writing letters on sunspots to Mark Welser. They were published in 1613. In his telescope, he

Paul Wittich (1,467 words) [view diff] exact match in snippet view article find links to article

Venus has a full set of phases like the Moon, published in his 1613 Letters on Sunspots, refuted the Ptolemaic geocentric model, which implied they are only

Federico Cesi (1,845 words) [view diff] exact match in snippet view article find links to article

published Galileo's Istoria e dimostrazione intorno alle macchie solari (Letters on Sunspots) in 1613, The Assayer in 1623, and also had a hand in defending Galileo