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Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei (/ ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ /, US also / ˌ ɡ æ l ɪ ˈ l iː oʊ-/; Italian: [ɡaliˈlɛːo ɡaliˈlɛːi]) or mononymously as Galileo, was a Florentine astronomer, physicist and engineer, sometimes described as a polymath.
Galileo's drawings of Jupiter and its Medicean Stars from Sidereus Nuncius. Image courtesy of the History of Science Collections, University of Oklahoma Libraries. In the last part of Sidereus Nuncius, Galileo reported his discovery of four objects that appeared to form a straight line of stars near Jupiter. On the first night he detected a ...
If true, this might predate Galileo's discovery by around two millennia. [9] The observations of Simon Marius are another noted example of observation, and he later reported observing the moons in 1609. [10] However, because he did not publish these findings until after Galileo, there is a degree of uncertainty around his records. [10]
In 1610, using his telescope, Galileo had discovered in that Venus, like the Moon, had a full set of phases, [44] but only in Letters on Sunspots did he commit this finding to publication. The fact that there was a full phase of Venus, (similar to a full moon) when Venus was in the same direction in the sky as the Sun meant that at a certain ...
In his book Mundus Iovialis ("The World of Jupiter"), published in 1614, Simon Marius, the court astronomer to the Margraves of Brandenburg-Ansbach, claimed to have discovered Io and the other moons of Jupiter in 1609, one week before Galileo's discovery. [7] According to Marius, he began observing the Jupiter system in late November 1609. [13]
Explore the universe with news on fascinating discoveries, scientific advancements and more. ... Brahe and Kepler, along with Sir Isaac Newton and Galileo Galilei, were giants who replaced the ...
Discoveries and Opinions of Galileo. New York: Doubleday Anchor Books. ISBN 0-385-09239-3. This has the full text of the letter, with commentary, as well as other short works of Galileo. Maurice A. Finocchiario (1989). The Galileo Affair. University of California Press. ISBN 978-0-520-06662-5. This compilation of relevant original documents ...
Jupiter moons, discovered in 1610 and named by Galileo Galilei thanks to his enhanced telescope. [474] These moons were found orbiting around Jupiter. If the Aristotelic geocentric theory had been correct, then these moons could not have existed. [475] This discovery, along with his observation of the phases of Venus, gave proof of a ...