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Bouguer, Pierre

(Encyclopedia) Bouguer, PierreBouguer, Pierrepyĕr b&oomacr;gĕrˈ [key], 1698–1758, French mathematician and hydrographer. He made some of the first photometric measurements, calculating the…

Ledyard, John

(Encyclopedia) Ledyard, JohnLedyard, Johnlĕdˈyərd [key], 1751–89, American adventurer, b. Groton, Conn. He studied at Dartmouth for year, but left college to ship as a sailor. In 1776 he joined Capt…

windsurfing

(Encyclopedia) windsurfing, also called boardsailing or sailboarding, water sport that employs a board-and-sail device and combines elements of sailing and surfing. The sailboard was first developed…

Eris, in astronomy

(Encyclopedia) Eris, in astronomy, the largest known dwarf planet. Eris, whose highly eccentric elliptical orbit ranges from 38 AU to 97 AU and is inclined more than 44°, is the largest known object…

Halley, Edmond

(Encyclopedia) Halley, EdmondHalley, Edmondhălˈē, hôˈlē [key], 1656–1742, English astronomer and mathematician. He is particularly noted as the first astronomer to predict the return of a comet and…

NASA Ships and Space Stations

by Mark Hughes Since its inception in 1958, NASA has built several lines of spaceships that made space exploration reality rather than a dream limited to science fiction, as well…

Rosh Hashanah - Jewish New Year

Feast of the Trumpets remembers world's creation by David Johnson Rosh Hashanah begins September 13, 2015 Related Links Lost Tribes of Israel Branches of Judaism…

Rawlings, Marjorie Kinnan

(Encyclopedia) Rawlings, Marjorie Kinnan, 1896–1953, American author, b. Washington, D.C., grad. Univ. of Wisconsin, 1918. She was a journalist until 1928, when she moved to the Florida backwoods,…

eclipse: Introduction

Introduction eclipse (ēklĭpsˈ, ĭ–) [key] [Gr., = failing], in astronomy, partial or total obscuring of one celestial body by the shadow of another. Best known are the lunar eclipses,…