"radio telescope"@en . . "300386744" . . "telescopes, radio"@en . "2013-07-23T13:58:54"^^ . "An instrument used in radio astronomy for detecting and recording radio emissions from space between wavelengths of about 30 megahertz and 300 gigahertz. Radio telescopes essentially consist of a large, concave metal bowl that serves as a directional aerial, capturing and focusing radio waves; along with a receiver and recording equipment."@en . . "2013-11-21T15:41:20"^^ . "radio telescopes"@en .