Astronomy

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Astronomy Definition

–noun
the science that deals with the material universe beyond the earth's atmosphere.

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    study of astronomical objects through observations of the infrared radiation that they emit. Various types of celestial objects-including the planets of the solar system, stars, nebulae, and ...
  • ultraviolet astronomy
    study of the ultraviolet spectra of astronomical objects. Ultraviolet radiation comes from a hotter region of the electromagnetic spectrum than visible light. For example, interstellar gas at ...
  • radio and radar astronomy
    study of celestial bodies by examination of the radio-frequency energy they emit or reflect. Radio waves penetrate much of the gas and dust in space, as well as the clouds of planetary atmospheres, ...
  • National Radio Astronomy Observatory
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    location of one of the world's largest fully steerable radio telescopes, which has a reflector that measures 76 metres (250 feet) in diameter. The telescope is located with other smaller radio ...
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