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quasar

(Encyclopedia)quasar kwāˈsär [key], one of a class of blue celestial objects having the appearance of stars when viewed through a telescope and currently believed to be the most distant and most luminous objects...

Cepheid variables

(Encyclopedia)Cepheid variables sēˈfēĭd [key], class of variable stars that brighten and dim in an extremely regular fashion. The periods of the fluctuations (the time to complete one cycle from bright to dim a...

Britten, Benjamin, Baron Britten of Aldeburgh

(Encyclopedia)Britten, Benjamin, Baron Britten of Aldeburgh, 1913–76, English composer. Britten's most characteristic expression is found in his vocal music, much of which was written for his partner, the tenor S...

minstrel show

(Encyclopedia)minstrel show, stage entertainment by white performers made up as blacks. Thomas Dartmouth Rice, who gave (c.1828) the first solo performance in blackface and introduced the song-and-dance act Jim Cro...

Boston Public Library

(Encyclopedia)Boston Public Library, founded in 1848, chiefly through the gift of Joshua Bates, and opened to the public in 1854. It is the oldest free public city library supported by taxation in the world and the...

red shift

(Encyclopedia)red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect...

Vesta, in astronomy

(Encyclopedia)Vesta vĕsˈtə [key], in astronomy, the fourth asteroid to be discovered. It was found in 1807 by H. Olbers. It is the third largest asteroid in size, with a diameter of c.326 mi (525 km). Its averag...

Hare, Sir David

(Encyclopedia)Hare, Sir David, 1947–, British playwright. Hare is a prominent member of the British theatrical left. A founder of the Portable Theatre and the Joint Stock, he became resident dramatist at the Roya...

Harlem

(Encyclopedia)Harlem, residential and business section of upper Manhattan, New York City, bounded roughly by 110th St., the East River and Harlem River, 168th St., Amsterdam Ave., and Morningside Park. The Dutch se...

Jefferson, Joseph

(Encyclopedia)Jefferson, Joseph, 1829–1905, American actor. He was the foremost of an old and distinguished family of English and American actors. Jefferson began his stage career as a child actor, and when the f...