|1.||Edward Charles. 1846--1919, US astronomer, who invented the meridian photometer|
|2.||his brother, William Henry. 1858--1938, US astronomer, who discovered Phoebe, the ninth satellite of Saturn, and predicted (1919) the existence and position of Pluto|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|Pickering (pĭk'ər-ĭng) Pronunciation Key
American astronomer who made many innovations in the equipment used to observe and measure the distance of stars. In 1884 he published the first catalog of stellar magnitudes. His brother William Henry Pickering (1858-1938) discovered Phoebe, the ninth moon of Saturn (1899), and predicted the existence of Pluto (1919).