(Encyclopedia) Eiffel Tower, structure designed by A. G. Eiffel and erected in the Champ-de-Mars for the Paris exposition of 1889. The tower is 984 ft (300 m) high and consists of an iron framework…
(Encyclopedia) month, in chronology, the conventional period of a lunation, i.e., passage of the moon through all its phases. It is usually computed at approximately 29 or 30 days. For the…
ORBITING VENUSLANDING ON EROSDESTINATION SATURN AND TITANMARS EXPLORATIONFIND OUT MOREScientists launch interplanetary missions to study the planets, asteroids, and comets close up. Mariner 2…
GRIGSBY, George Barnes, a Delegate from the Territory of Alaska; born in Sioux Falls, Dak. (now South Dakota), December 2, 1874; attended the public schools, State University, Vermillion, S.…
(Encyclopedia) Leinsdorf, ErichLeinsdorf, Erichĕrˈĭkh līzˈdôrf, līntsˈ– [key], 1912–93, American conductor, b. Vienna. Leinsdorf studied at the Vienna state academy of music and in 1934 began his…
(Encyclopedia) Lairesse, Gerard deLairesse, Gerard degāˈrärt də lārĕsˈ [key], 1641–1711, Flemish painter of allegorical and religious subjects, b. Liège. Most of his life was spent in Holland, where…
Formation of the Solar System The Sun The Moon The Moon's Phases Some Facts about Eclipses Mercury Planet Mercury Video Venus Earth Mars Planet Mars Video and Activities Jupiter…
Encyclopedia: Space Mars Video and Educational Activities The Universe Constellations and Stars The Solar System Space Exploration NASA Turns 50 Space Shuttle Timeline New Planetary…
(Encyclopedia) Schiaparelli, Giovanni VirginioSchiaparelli, Giovanni Virginiojōvänˈnē vērjēˈnyō [key]Schiaparelli, Giovanni Virginio skyäpärĕlˈlē [key], 1835–1910, Italian astronomer. He was director…
(Encyclopedia) Bode's law [for J. E. Bode], also known as Titius's law or the Titius-Bode law, empirical relationship between the mean distances of the planets from the sun. If each number in the…
