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mass-luminosity relation

(Encyclopedia)mass-luminosity relation, in astronomy, law stating that the luminosity of a star is proportional to some power of the mass of the star. More massive stars are in general more luminous. For stars on t...

Philby, Kim

(Encyclopedia)Philby, Kim (Harold Adrian Russell Philby), 1912–88, British double agent, son of Harry St. John Bridger Philby, studied Trinity College, Cambridge. A longtime high-ranking member of Britain's MI6 i...

Pincay, Laffit Alejandro, Jr.

(Encyclopedia)Pincay, Laffit Alejandro, Jr. läfˈēt älākhänˈdrō pēnˈkī, pĭnˈ– [key], 1946–, Panamanian jockey, b. Panama City. He began racing in Panama and came to the United States in 1965. Known ...

Moore, George Edward

(Encyclopedia)Moore, George Edward, 1873–1958, English philosopher, b. Upper Norwood. He was educated at Cambridge, where he was a fellow (1898–1904) and then a lecturer (1911–25) in the department of moral s...

Frege, Gottlob

(Encyclopedia)Frege, Gottlob gôtˈlōp frāˈgə [key], 1848–1925, German philosopher and mathematician. He was professor of mathematics (1879–1918) at the Univ. of Jena. Frege was one of the founders of moder...

Johnson, Lady Bird

(Encyclopedia)Johnson, Lady Bird, 1912–2007, b. Karnack, Tex., as Claudia Alta Taylor. She married (1934) Lyndon B. Johnson and played an active role in his political career. As first lady (1963–69), she was th...

Abbey Theatre

(Encyclopedia)Abbey Theatre, Irish theatrical company devoted primarily to indigenous drama. W. B. Yeats was a leader in founding (1902) the Irish National Theatre Society with Lady Gregory, J. M. Synge, and A. E. ...

Caroline of Brunswick

(Encyclopedia)Caroline of Brunswick, 1768–1821, consort of George IV of England. The daughter of Charles William Ferdinand, duke of Brunswick, she married George (then prince of Wales) in 1795. She bore him one d...

Helmholtz, Hermann Ludwig Ferdinand von

(Encyclopedia)Helmholtz, Hermann Ludwig Ferdinand von hĕrˈmän lo͞otˈvĭkh fĕrˈdēnänt fən hĕlmˈhôlts [key], 1821–94, German scientist. Although known especially as a physicist and biologist, he was al...

Great Falls

(Encyclopedia)Great Falls, city (2020 pop. 60,442), seat of Cascade co., N central Mont., second largest city in the state, at the confluence of the Missouri and Sun ...