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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 an Italian [a] astronomer, physicist and engineer, sometimes described as a polymath.
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
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 ...
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 ...
The Sidereal messenger of Galileo Galilei, and a part of the preface to Kepler's Dioptrics. Waterloo Place, London: Oxford and Cambridge, January 1880. 148 pp. ISBN 9781151499646. Stillman Drake. Discoveries and Opinions of Galileo, includes translation of Galileo's Sidereus Nuncius. Doubleday: Anchor, 1957. 320 pp. ISBN 978-0385092395.
1608 – Earliest known telescopes; 1609, 1619 – Kepler: Kepler's laws of planetary motion; 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)
Like our home galaxy, the newly discovered ceers-2112 is a barred spiral galaxy, and it’s now the most distant of its kind ever observed. The bar at the center of the structure is made of stars.
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".