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Major Planets of the Solar System (table)

(Encyclopedia) Major Planets of the Solar System Planet Distance from the sun (AU) Period of revolution Period of rotation Mass (earth=1) Diameter (earth=1) Number of confirmed satellites…

Cassini

(Encyclopedia) CassiniCassinikäs-sēˈnē [key], name of a family of Italian-French astronomers, four generations of whom were directors of the Paris Observatory. Gian Domenico Cassini, 1625–1712, was…

Tombaugh, Clyde William

(Encyclopedia) Tombaugh, Clyde WilliamTombaugh, Clyde Williamtŏmˈbô [key], 1906–97, American astronomer, b. Streator, Ill. Although lacking formal training or a college degree, he was hired in 1929…

Orléans, Gaston, duc d'

(Encyclopedia) Orléans, Gaston, duc d'Orléans, Gaston, duc d'gästôNˈ [key]Orléans, Gaston, duc d' dük dôrlāäNˈ [key], 1608–60, son of King Henry IV and Marie de' Medici, younger brother of Louis XIII…

Kepler's laws

(Encyclopedia) CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F).…

Keneally, Thomas

(Encyclopedia) Keneally, ThomasKeneally, Thomaskənēˈlē [key], 1935–, Australian novelist, b. Sydney. For a time a student of religion, and later of law, Keneally has ranged over a wide spectrum of…

Bradbury, Ray

(Encyclopedia) Bradbury, Ray (Raymond Douglas Bradbury)Bradbury, Ray (Raymond Douglas Bradbury)brădˈbĕrˌē, –bərē [key], 1920–2012, American writer, b. Waukegan, Ill. A popular and prolific writer of…

Pennebaker, D. A.

(Encyclopedia) Pennebaker, D. A. (Donn Alan Pennebaker), 1925–2019, pioneering documentary filmmaker, b. Evanston, Ill. His first film, Daybreak Express (1958), is a five-minute short detailing New…

Sacks, Oliver Wolf

(Encyclopedia) Sacks, Oliver Wolf, 1933–2015, British neurologist and author, b. London, educated at Queen's College, Oxford. In 1960 he moved to the United States, where he continued his medical…

Kuiper, Gerard Peter

(Encyclopedia) Kuiper, Gerard Peter or Gerrit PieterKuiper, Gerard Peter or Gerrit Pietergĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the…