John Couch Adams

:For other people named John Adams, see John Adams (disambiguation).

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John Couch Adams (June 5 1819 – January 21, 1892), was a British mathematician and astronomer. Adams was born in Laneast, Cornwall and died in Cambridge.

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His most famous achievement was predicting the existence and position of Neptune, using only mathematics. The calculations were made to explain discrepancies with Uranus's orbit and the laws of Kepler and Newton. At the same time, but unknown to both, the same calculations were made by Urbain Le Verrier. Le Verrier would assist Galle in locating the planet (September 1846); which was found within 1? of its predicted location, a point in Aquarius. (There was, and to some extent still is, some controversy over the apportionment of credit for the discovery; see Discovery of Neptune.)

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He was Lowndean Professor at the University of Cambridge for 33 years from 1859 to his death. He won the Gold Medal of the Royal Astronomical Society in 1866. In 1884, he attended the International Meridian Conference as a delegate for Great Britain.

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A crater on the Moon is jointly named after him, Walter Sydney Adams and Charles Hitchcock Adams. Neptune's outermost known ring and the asteroid 1996 Adams are also named after him.

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June 5: June 5 is the 156th day of the year in the Gregorian calendar (157th in leap years), with 209 days remaining....

1819: 1819 was a common year starting on Friday (see link for calendar)....

January 21: January 21 is the 21st day of the year in the Gregorian Calendar. There are 344 days remaining (345 in leap years)....

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