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Rubin, Vera

(Encyclopedia)Rubin, Vera, 1928–2016, American astronomer, b. Philadelphia as Vera Florence Cooper, Ph.D. Georgetown (1954). After teaching at Georgetown, she joined (1965) the Carnegie Institution's department o...

Russell, Henry Norris

(Encyclopedia)Russell, Henry Norris, 1877–1957, American astronomer, b. Oyster Bay, N.Y., grad. Princeton, 1897. In 1902 he went to Cambridge, England, to study. He returned to Princeton in 1905, was professor of...

Rhea, in astronomy

(Encyclopedia)Rhea, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn V (or S5), Rhea is 950 mi (1530 km) in diameter, orbits Saturn at a mean distance of 327,487 mi (527,...

Scholz's star

(Encyclopedia)Scholz's star, dim binary star system, consisting of a red dwarf and brown dwarf, in the constellation Monoceros, apparent magnitude 18.3. The red dwarf is a tiny star, with less than ten percent the ...

Hamilton, Sir William Rowan

(Encyclopedia)Hamilton, Sir William Rowan, 1805–65, Irish mathematician and astronomer, b. Dublin. A child prodigy, he had mastered 13 languages by the age of 13 and was still an undergraduate when he became prof...

Carruthers, George Richard

(Encyclopedia) Carruthers, George Richard, 1939-2020, African-American astrophysicist, b. Cincinnati, OH, Univ. of Illinois at Urbana-Champaign (BS, 1961; MS, nuclear...

Hexapla

(Encyclopedia)Hexapla hĕkˈsəplə [key] [Gr.,=sixfold], polyglot edition of the Hebrew Bible prepared by Origen (c.185–c.255). It was mainly in six columns—a Hebrew text (probably the Masoretic), a Greek tran...

city-state

(Encyclopedia)city-state, in ancient Greece, Italy, and Medieval Europe, an independent political unit consisting of a city and surrounding countryside. The first city-states were in Sumer, but they reached their p...

Cresilas

(Encyclopedia)Cresilas or Kresilas both: krĕsˈĭləs [key], fl. c.450 b.c., Greek sculptor, b. Crete. He worked at Athens. His statue of Pericles is the earliest Greek portrait statue that has been identified. ...

Mesolóngion

(Encyclopedia)Mesolóngion mĭsəlôngˈgē [key], town (1991 pop. 12,103), capital of Aetolia and Acarnania prefecture, W central Greece, a port on the Gulf of Pátrai. It trades in fish, wine, and tobacco. Mesol�...