John Flamsteed (1646-1719) was the first Astronomer Royal, appointed to the newly founded Greenwich Observatory. Charged with improving navigation at sea, he used meticulous telescopic observations to compile a 'Catalogue of British Stars', radically updating Tycho Brahe's previous naked-eye calculations. However he delayed publishing, leading to a vituperative quarrel with contemporaries Newton and Halley, who published his results without his permission...