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Sir Isaac Newton (25 December 1642 – 20 March 1726/27 [a]) was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, and author who was described in his time as a natural philosopher. [5] Newton was a key figure in the Scientific Revolution and the Enlightenment that followed. [6]
Newtonian telescope design. A Newtonian telescope is composed of a primary mirror or objective, usually parabolic in shape, and a smaller flat secondary mirror.The primary mirror makes it possible to collect light from the pointed region of the sky, while the secondary mirror redirects the light out of the optical axis at a right angle so it can be viewed with an eyepiece.
It is described as the better of the instruments Newton built. [2] The first reflecting telescope built by Sir Isaac Newton in 1668 [3] is a landmark in the history of telescopes, being the first known successful reflecting telescope. [4] [5] It was the prototype for a design that later came to be called the Newtonian telescope. There were some ...
1666–1675: Theories on optics proposed by Sir Isaac Newton (1642–1726/7); Newton published Opticks in 1704. 1687: Law of universal gravitation formulated in the Principia by Sir Isaac Newton (1642–1726/7). 1687: Newton's laws of motion formulated in the Principia. 1800: Infrared radiation discovered by Sir William Herschel (1738–1822).
Sir Isaac Newton at 46 in Godfrey Kneller's 1689 portrait. The following article is part of a biography of Sir Isaac Newton, the English mathematician and scientist, author of the Principia. It portrays the years after Newton's birth in 1643, his education, as well as his early scientific contributions, before the writing of his main work, the Principia Mathematica, in 1685. Overview of Newton ...
The tree at Cambridge University Botanic Garden was a scion - a descendent - of the tree that was said to have inspired Sir Isaac Newton's theory of gravity. The apple tree fell in February 2022.
In an apparent early modern example of urban legend, the invention of the pet door was attributed to Isaac Newton (1642–1727) in a story (authored anonymously and published in a column of anecdotes in 1893) to the effect that Newton foolishly made a large hole for his adult cat and a small one for her kittens, not realizing the kittens could ...
Newtonian telescope – Sir Isaac Newton; Newton's laws of motion – Sir Isaac Newton; First full-scale commercial Nuclear Reactor at Calder Hall, opened in 1956. [200] Nuclear transfer – Is a form of cloning first put into practice by Ian Wilmut and Keith Campbell to clone Dolly the Sheep; Oxygen gas (O2) discovered – Joseph Priestley