John Flamsteed

John Flamsteed (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal. Born in Denby, Derbyshire, he was educated at Derby School. Despite health issues delaying his entry to Cambridge, he developed a keen interest in mathematics and astronomy. He became the first Astronomer Royal in 1675, a position he held until his death. His main achievements were the *Catalogus Britannicus*, a 3,000-star catalogue, and the star atlas *Atlas Coelestis*, both published posthumously. He also made the first recorded observations of Uranus, though he mistakenly catalogued it as a star. Flamsteed laid the foundation stone for the Royal Greenwich Observatory and spent forty years meticulously recording data. His work significantly improved the accuracy of star catalogues. Despite conflicts, notably with Isaac Newton and Edmond Halley over the publication of his data, his contributions formed a cornerstone of astronomical cataloguing.