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Hu Han-min
(Encyclopedia)Hu Han-min ho͞o hän-mĭn [key], 1879–1936, Chinese statesman. While studying law in Japan (1905) he was associated with Sun Yat-sen in revolutionary activities. After the revolution of 1911, Hu op...Aristarchus of Samos
(Encyclopedia)Aristarchus of Samos ărˌĭstärˈkəs, sāˈmŏs [key], fl. c.310 b.c.–c.230 b.c., Greek astronomer and mathematician of the Alexandrian school. He is said to have been the first to propose a heli...rainbow
(Encyclopedia)rainbow, arc showing the colors of the spectrum, violet inside and red outside, which appears when the sun shines through water droplets. It often appears while the sun is shining after a brief thunde...coronagraph
(Encyclopedia)coronagraph kərōˈnəgrăfˌ [key], device invented by the French astronomer B. Lyot (1931) for the purpose of observing the corona of the sun and solar prominences occurring in the chromosphere. Be...photosphere
(Encyclopedia)photosphere, luminous, apparently opaque layer of gases that forms the visible surface of the sun or any other star. The photosphere lies between the dense interior gases and the more attenuated gases...solar system
(Encyclopedia) CE5 Solar system CE5 solar system, the sun and the surrounding planets, natural satellites, dwarf planets, asteroids, meteoroids, and comets that are bound by its gravity. The sun is by far the ...Fraunhofer lines
(Encyclopedia)Fraunhofer lines frounˈhôfər [key]: see sun. ...seasons
(Encyclopedia) CE5 The seasons are caused by the tilt of the earth's axis to the plane of its orbit about the sun. The Northern Hemisphere is tilted toward the sun in the summer and receives more direct rays than...solar time
(Encyclopedia)solar time, time defined by the position of the sun. The solar day is the time it takes for the sun to return to the same meridian in the sky. Local solar time is measured by a sundial. When the cente...Moon, Sun Myung
(Encyclopedia)Moon, Sun Myung sŭn yŭng mo͞on [key], 1920–2012, South Korean religious leader. He was an engineering student in Japan and a dockworker before founding (1954) the Unification Church with a doctri...Browse by Subject
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