Search

Search results

Displaying 1 - 10

Moon, Sun Myung

(Encyclopedia) Moon, Sun MyungMoon, Sun Myungsŭn yŭng m&oomacr;n [key], 1920–2012, South Korean religious leader. He was an engineering student in Japan and a dockworker before founding (1954)…

phase, in astronomy

(Encyclopedia) CE5 Phases of the moon phase, in astronomy, the measure of how much of the illuminated surface of a planet or satellite can be seen from a point at a distance from that body; the…

eclipse

(Encyclopedia) CE5 A. Lunar eclipse B. Solar eclipse eclipseeclipseēklĭpsˈ, ĭ– [Gr.,=failing], in astronomy, partial or total obscuring of one celestial body by the shadow of another. Best known…

escape velocity

(Encyclopedia) escape velocity, the velocity a body must be given in order to escape the gravitational hold of some other larger body, e.g., the earth, moon, or sun. A body given less than the escape…

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…

tide

(Encyclopedia) tide, alternate and regular rise and fall of sea level in oceans and other large bodies of water. These changes are caused by the gravitational attraction of the moon and, to a lesser…

ephemeris time

(Encyclopedia) ephemeris time (ET), astronomical time defined by the orbital motions of the earth, moon, and planets. The earth does not rotate with uniform speed, so the solar day is an imprecise…

Aristarchus of Samos

(Encyclopedia) Aristarchus of SamosAristarchus of Samosărˌĭstärˈkəs, [key]Aristarchus of Samosărˌĭstärˈkəs, sāˈmŏs [key], fl. c.310 b.c.–c.230 b.c., Greek astronomer and mathematician of the…

moon

(Encyclopedia) CE5 The moon: Near side CE5 The moon: Far side moon, natural satellite of a planet (see satellite, natural) or dwarf planet, in particular, the single natural satellite of the…

conjunction, in astronomy

(Encyclopedia) conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun. When a body is…