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Xena

(Encyclopedia)Xena, in astronomy: see Eris.

population I and II

(Encyclopedia)population I and II, in astronomy: see stellar populations. ...

Playfair, John

(Encyclopedia)Playfair, John, 1748–1819, Scottish mathematician, physicist, and geologist. He was educated at St. Andrews and Edinburgh and taught first mathematics and then physics and astronomy at the latter un...

capacitor

(Encyclopedia)capacitor or condenser, device for the storage of electric charge. Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting ...

Richter scale

(Encyclopedia)Richter scale rĭkˈtər [key], measure of the magnitude of seismic waves from an earthquake. Devised in 1935 by the American seismologist Charles F. Richter (1900–1985) and technically known as the...

Theodorakis, Mikis

(Encyclopedia) Theodorakis, Mikis , 1925-2021, Greek composer and politician, b. Chios island, Greece, Athens Conservatoire (1950). Theodorakis showed interest in mus...

Menotti, Gian-Carlo

(Encyclopedia)Menotti, Gian-Carlo jänˈ-kärˈlō mānôtˈtē [key], 1911–2007, Italian composer. Menotti was taught music by his mother and composed his first opera at 10. He studied at the Verdi Conservatory,...

King, B. B.

(Encyclopedia)King, B. B., 1925–2015, African-American blues singer and guitarist, b. near Indianola, Miss., as Riley B. King. He grew up poor in the Mississippi Delta region, began playing the guitar at 12, was ...

Surrey

(Encyclopedia)Surrey, county (1991 pop. 997,000), 653 sq mi (1,691 sq km), SE England. The county seat is Guildford. Administratively, the county is divided into the districts of Elmbridge, Epsom and Ewell, Guildfo...