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Rogge, Jacques

(Encyclopedia) Rogge, JacquesRogge, Jacqueszhäk rōˈkhə [key], 1942–, Belgian sports executive, b. Ghent. An orthopedic surgeon with a degree in sports medicine, Rogge is an accomplished sailor who…

February 2007 Phenomena

For terms in boldface, see Astronomical Terms. Day Phenomenon Hour 1 Pallas, the second-largest asteroid, is in…

satellite, natural

(Encyclopedia) satellite, natural, celestial body orbiting a planet, dwarf planet, asteroid, or star of a larger size. The most familiar natural satellite is the earth's moon; thus, satellites of…

All About Oceans

by Beth Rowen Honolii Beach Park, Hawaii Source: AP Photo/Caleb Jones Related Links Profile of the World's Oceans and Seas…

Gravity

How it works and its effect on Earth, the Moon, and the Sun by Mark Hughes Related Links Encyclopedia: Earth The Moon Sir Isaac Newton   You are shrinking right now.…

Cyrano de Bergerac, Savinien

(Encyclopedia) Cyrano de Bergerac, SavinienCyrano de Bergerac, SaviniensävēnyăNˈ sēränōˈ də bĕrzhəräkˈ [key], 1619–55, French novelist. Satirizing the customs and beliefs of his time, he wrote two…

node

(Encyclopedia) node, in astronomy, point at which the orbit of a body crosses a reference plane. One reference plane that is often used is the plane of the earth's orbit around the sun (ecliptic).…

synodic period

(Encyclopedia) synodic periodsynodic periodsĭnŏdˈĭk [key], in astronomy, length of time during which a body in the solar system makes one orbit of the sun relative to the earth, i.e., returns to the…

halo, in meteorology

(Encyclopedia) halo, in meteorology, short-lived circles or arcs, and less commonly spikes and crosses, of colored or whitish light surrounding the moon or sun or in clouds as seen from above. A halo…