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space probe
(Encyclopedia)space probe, space vehicle carrying sophisticated instrumentation but no crew, designed to explore various aspects of the solar system (see space exploration). Unlike an artificial satellite, which is...gamma-ray astronomy
(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...Ohio, state, United States
(Encyclopedia) CE5 Ohio, midwestern state in the Great Lakes region of the United States. It is bordered by Pennsylvania (NE), West Virginia (SE) and Kentucky (S) across the Ohio River, Indiana (W), and Michigan ...Richmond, cities, United States
(Encyclopedia)Richmond. 1 City (1990 pop. 87,425), Contra Costa co., W Calif., on San Pablo Bay, an inlet of San Francisco Bay; inc. 1905. It is a deepwater commercial port and an industrial center with oil refiner...steamship
(Encyclopedia)steamship, watercraft propelled by a steam engine or a steam turbine. Despite such innovations as turbo-electric drive, which converts steam energy into rotational power for turning the propeller...civil service
(Encyclopedia)civil service, entire body of those employed in the civil administration as distinct from the military and excluding elected officials. The term was used in designating the British administration of I...Herod
(Encyclopedia)Herod, dynasty reigning in Palestine at the time of Jesus. As a dynasty the Herods depended largely on the power of Rome. They are usually blamed for the state of virtual anarchy in Palestine at the b...Blake, William
(Encyclopedia)Blake, William, 1757–1827, English poet and artist, b. London. Although he exerted a great influence on English romanticism, Blake defies characterization by school, movement, or even period. At the...feudalism
(Encyclopedia)feudalism fyo͞oˈdəlĭzəm [key], form of political and social organization typical of Western Europe from the dissolution of Charlemagne's empire to the rise of the absolute monarchies. The term fe...Locke, John
(Encyclopedia)Locke, John lŏk [key], 1632–1704, English philosopher, founder of British empiricism. Locke summed up the Enlightenment in his belief in the middle class and its right to freedom of conscience and ...Browse by Subject
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