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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 Galilei was among the first to use a telescope to observe the sky, and after constructing a 20x refractor telescope. [83] He discovered the four largest moons of Jupiter in 1610, which are now collectively known as the Galilean moons, in his honor. [84] This discovery was the first known observation of satellites orbiting another planet ...
1608 – Hans Lippershey tries to patent an optical refracting telescope, the first recorded functional telescope; 1609 – Galileo Galilei builds his first optical refracting telescope; 1616 – Niccolò Zucchi experiments with a reflecting telescope; 1633 – Construction of Leiden University Observatory
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 ...
Notes on Hans Lippershey's unsuccessful telescope patent in 1608. The first record of a telescope comes from the Netherlands in 1608. It is in a patent filed by Middelburg spectacle-maker Hans Lippershey with the States General of the Netherlands on 2 October 1608 for his instrument "for seeing things far away as if they were nearby." [12] A few weeks later another Dutch instrument-maker ...
A claim will be made 37 years later by another Dutch spectacle-maker that his father, Zacharias Janssen, invented the telescope. [17] A replica of Galileo's telescope. 1609 — Galileo Galilei makes his own improved version of Lippershey's telescope, calling it a "perspicillum".
Weather permitting, Jupiter will not only be brighter than most other stars and planets in the evening sky, but will also be visible all night long. Jupiter, ascending: See our solar system’s ...
1610 – Galileo Galilei: discovered the Galilean moons of Jupiter; 1613 – Galileo Galilei: Inertia; 1621 – Willebrord Snellius: Snell's law; 1632 – Galileo Galilei: The Galilean principle (the laws of motion are the same in all inertial frames) 1660 – Blaise Pascal: Pascal's law; 1660 – Robert Hooke: Hooke's law; 1662 – Robert ...