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Galileo Galilei almost certainly began telescopic sunspot observations around the same time as Harriot, given he made his first telescope in 1609 on hearing of the Dutch patent of the device, and that he had managed previously to make naked-eye observations of sunspots. He is also reported to have shown sunspots to astronomers in Rome, but we ...
Thomas Harriot is recognized as the first person to observe sunspots in 1610 with the use of a telescope. [38] Harriot observed the sunspot with the use of a telescope in a direct and hazardous way. [39] Even though Harriot observed the Sun directly through his telescope, there were no recorded injuries to his eyes. [4]
The first clear mention of a sunspot in Western literature is circa 300 BC, by ancient Greek scholar Theophrastus, student of Plato and Aristotle and successor to the latter. [10] The earliest known drawings of sunspots were made by English monk John of Worcester in December 1128. [11] [12]
German astronomer Johannes Kepler made sketches of sunspots in 1607 from his observations of the sun’s surface — and centuries later, the pioneering drawings are helping scientists solve a ...
Galileo published a description of sunspots in 1613 entitled Letters on Sunspots suggesting the Sun and heavens are corruptible. [245] The Letters on Sunspots also reported his 1610 telescopic observations of the full set of phases of Venus, and his discovery of the puzzling "appendages" of Saturn and their even more puzzling subsequent ...
The sunspot activity of December 1610 was the first to be observed using the newly invented telescope, by Thomas Harriot, who sketched what he saw but did not publish it. [12] In 1611 Johannes Fabricius saw them, and published a pamphlet entitled De Maculis in Sole Observatis , which Galileo was not aware of before he wrote the Letters on Sunspots.
German astronomer Johannes Kepler used a projecting device in 1607 to help him sketch the sunspots he saw just a few years before the first telescopic observations of the features.
Despite the difficulties of observing the Sun directly with a telescope, they noted the existence of sunspots, one of the first confirmed instance of such observations telescopically; sunspots had first been identified without telescopes in ancient China and Greece.