Sir Frank Watson Dyson, KBE, FRS, FRSE was an English astronomer and the ninth Astronomer Royal who is remembered today largely for introducing time signals ("pips") from Greenwich, England, and for the role he played in proving Einstein's theory of general relativity.
Frank Watson Dyson
Dyson, fourth from the left, rides in an automobile; possibly during the Fifth Conference of the International Union for Co-operation in Solar Research, held in Bonn, Germany, 1913
Dyson at the Fourth Conference International Union for Cooperation in Solar Research at Mount Wilson Observatory, 1910
Eclipse photograph from 1919 expedition
Astronomer Royal is a senior post in the Royal Households of the United Kingdom. There are two officers, the senior being the astronomer royal dating from 22 June 1675; the junior is the astronomer royal for Scotland dating from 1834. The Astronomer Royal works to make observations to improve navigation, cartography, instrument design, and applications of geomagnetism. The position was created with the overall goal of discovering a way to determine longitude at sea when out of sight of land.
John Flamsteed, the first astronomer royal, by Thomas Gibson. Royal Society, London.
Image: John Flamsteed 1702
Image: Edmond Halley 072
Image: James Bradley by Thomas Hudson
