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X-ray astronomy
(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...astronautics
(Encyclopedia)astronautics: see space science. ...Meteosat
(Encyclopedia)Meteosat: see European Space Agency. ...Arianespace
(Encyclopedia)Arianespace: see European Space Agency. ...lunar exploration
(Encyclopedia)lunar exploration: see space exploration. ...McDonald Observatory
(Encyclopedia)McDonald Observatory, astronomical observatory located on Mt. Locke, near Fort Davis, Tex.; founded in 1932, sponsored by the Univ. of Texas in cooperation with the Univ. of Chicago. Its equipment inc...dwarf tree
(Encyclopedia)dwarf tree, in horticultural practice, a tree artificially kept to a smaller size than is normal for average members of the species. This is usually accomplished either by limiting its root space and ...NASA
(Encyclopedia)NASA: see National Aeronautics and Space Administration. ...Space Infrared Telescope Facility
(Encyclopedia)Space Infrared Telescope Facility: see observatory, orbiting. ...Sagan, Carl Edward
(Encyclopedia)Sagan, Carl Edward sāˈgən [key], 1934–96, American astronomer and popularizer of science, b. New York City. Early in his career he investigated radio emissions from Venus and concluded that the c...Browse by Subject
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