Columbia Encyclopedia

(Encyclopedia) Jupiter jo͞oˈpətər [key], in astronomy, 5th planet from the sun and largest planet of the solar system. Astronomers have discovered 79 satellites orbiting Jupiter, but five of those, small sate...

(Encyclopedia) Hades hāˈdēz [key], in Greek and Roman religion and mythology. 1 The ruler of the underworld: see Pluto. 2 The world of the dead, ruled by Pluto and Persephone, located either underground or in the...

(Encyclopedia)  CE5 Comet: Whatever the direction of a comet's flight, its “tail” always points away from the sun. The tail disappears when the comet is far from the sun. comet [Gr.,=longhaired], a small cele...

(Encyclopedia)  CE5 Saturn and its ring system as seen from Earth Saturn, in astronomy, 6th planet from the sun. Saturn has 82 confirmed natural satellites, many of which have not been named. Five of the discov...

(Encyclopedia) Pickering, William Henry, 1858–1938, American astronomer, b. Boston, grad. Massachusetts Institute of Technology (B.S., 1879). He taught at the Massachusetts Institute of Technology (1880–87) and ...

(Encyclopedia) neutrino astronomy, study of stars by means of their emission of neutrinos, fundamental particles that result from nuclear reactions and are emitted by stars along with light. Approximately 100 billio...

(Encyclopedia) Persephone prōsûrˈpənē [key], in Greek and Roman religion and mythology, goddess of fertility and queen of the underworld. She was the daughter of Zeus and Demeter. When she was still a beautiful...

(Encyclopedia) Tombaugh, Clyde William tŏmˈbô [key], 1906–97, American astronomer, b. Streator, Ill. Although lacking formal training or a college degree, he was hired in 1929 as an assistant by the Lowell Obse...

(Encyclopedia) Lowell Observatory, astronomical observatory located in Flagstaff, Ariz.; it was founded in 1894 by Percival Lowell, the American astronomer who popularized the idea that Mars might support intelligen...

(Encyclopedia) Aquila [Lat.,=the eagle], equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way. It is sometimes depicted as an eagle. It contains the bright star Altair (Al...