The sidereal messenger of Galileo Galilei : $b and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries
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"The Sidereal Messenger of Galileo Galilei" is an astronomical treatise published in 1610. It marks the first published scientific work based on telescopic observations. Galileo reveals stunning discoveries: mountains on the Moon's surface, hundreds of previously invisible stars in the Milky Way, and four celestial bodies orbiting Jupiter. Through detailed drawings and descriptions, he challenges long-held beliefs about the heavens. His observations of what he called the "Medicean Stars" would forever change humanity's understanding of the cosmos and our place within it.
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Why is The sidereal messenger of Galileo Galilei : $b and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries only $2.97?
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