(Encyclopedia) EratosthenesEratosthenesĕrətŏsˈthənēz [key], c.275–c.195 b.c., Greek scholar, b. Cyrene. A pupil of Callimachus in Athens, he became (c.240 b.c.) head of the library at Alexandria.…
(Encyclopedia) Atlas, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XV (or S15), Atlas is a small, irregularly shaped (nonspherical) body measuring…
(Encyclopedia) TezcatlipocaTezcatlipocatĕskätlēpōˈkä [key], ancient deity of the Toltec in Mexico. Identified with the night sky, the moon, and the stars, and associated with the forces of evil and…
(Encyclopedia) Ungerer, Tomi (Jean-Thomas Ungerer), 1931–2019, French author-illustrator and artist, b. Strasbourg, Alsace. He briefly attended the École des Arts Decoratifs in Strasbourg, then…
ORBITING VENUSLANDING ON EROSDESTINATION SATURN AND TITANMARS EXPLORATIONFIND OUT MOREScientists launch interplanetary missions to study the planets, asteroids, and comets close up. Mariner 2…
WHAT CAN FORCES DO? HOW CAN YOU MEASURE A FORCE? WHAT ARE BALANCED FORCES? GRAVITYFIND OUT MOREWhen you strike a ball with a bat, stretch a rubber band, or lift a suitcase, you are applying a force.…
(Encyclopedia) Dyson, Sir Frank WatsonDyson, Sir Frank Watsondīˈsən [key], 1868–1939, English astronomer, b. Ashby-de-la-Zouch, grad. Cambridge. He was astronomer royal of Scotland (1905–10) and of…
(Encyclopedia) Hart, Lorenz Milton, 1895–1943, American lyricist, b. New York City, studied at Columbia. Hart began collaborating with Richard Rodgers in 1919; their initial success was The Garrick…
(Encyclopedia) Native American Church, Native American religious group whose beliefs blend fundamentalist Christian elements with pan–Native American moral principles. The movement began among the…
(Encyclopedia) Pan, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XVIII (or S18), Pan is 12.5 mi (20 km) in diameter, orbits Saturn at a mean distance…
