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ring, in astronomy

(Encyclopedia) ring, in astronomy, relatively thin band of rocks and dust and ice particles that orbit around a planet in the planet's equatorial plane. All four of the giant planets in the solar…

Orr, Bobby

(Encyclopedia) Orr, Bobby (Robert Orr), 1948–, Canadian hockey player. He began skating at the age of 4 and was discovered by the Boston Bruins of the National Hockey League at age 12. He began…

Lowe, Thaddeus Sobieski Coulincourt

(Encyclopedia) Lowe, Thaddeus Sobieski CoulincourtLowe, Thaddeus Sobieski Coulincourtthădˈēəs sōˌbē-ĕsˈkē kōˈlĭnkôrtˌ lō [key], 1832–1913, American aeronaut and inventor, b. Coos co., N.H. He flew (…

calcium chloride

(Encyclopedia) calcium chloride, CaCl2, chemical compound that is crystalline, lumpy, or flaky, is usually white, and is very soluble in water. The anhydrous compound is hygroscopic; it rapidly…

Weddell Sea

(Encyclopedia) Weddell SeaWeddell Seawĕdˈəl [key], arm of the Atlantic Ocean, W Antarctica, SE of South America, bordered by the Antarctic Peninsula and Coats Land. The vast Ronne and Filchner ice…

Shackleton, Sir Ernest Henry

(Encyclopedia) Shackleton, Sir Ernest Henry, 1874–1922, British antarctic explorer, b. Ireland. The first of his voyages to Antarctica was made as a member of the expedition (1901–4) of Robert F.…

lightning

(Encyclopedia) lightning, electrical discharge accompanied by thunder, commonly occurring during a thunderstorm. The discharge may take place between one part of a cloud and another part (intracloud…

Paleolithic period

(Encyclopedia) Paleolithic periodPaleolithic periodpāˌlēəlĭthˈĭk, –lēō–, pălˌ– [key] or Old Stone Age, the earliest period of human development and the longest phase of mankind's history. It is…

Perlman, Itzhak

(Encyclopedia) Perlman, Itzhak, 1945–, Israeli musician, one of the greatest violinists of his generation, b. Tel Aviv. A child prodigy, he gave a solo violin recital at age ten, appeared on American…