John Flamsteed, (born Aug. 19, 1646, Denby, near Derby, Derbyshire, Eng.-died Dec. 31, 1719, Greenwich, London), founder of the Greenwich Observatory, and the first astronomer royal of England.Poor health forced Flamsteed to leave school in 1662. He studied astronomy on his own and later (1670-74) continued his education at the University of Cambridge. In 1677 he became a member of the Royal Society. Ordained a clergyman in 1675, Flamsteed in 1684...