Assertion: radio telescope | /r/HasProperty | device
Facets:
Source sentences:
text: The first radio telescope, built in 1937 by Grote Reber of Wheaton, Ill., U.S., was a steerable paraboloid--i.e., a device with a parabolically shaped reflector, dubbed the "dish," that focuses the incoming radio waves onto a small pickup antenna, or "feed.
text: A radio telescope is a device that gathers and concentrates radio waves; it is analogous to an optical telescope, which gathers and concentrates light waves.
text: A radio telescope was a device that used radio waves to observe the heavens.
text: Radio telescopes are devices that are designed to receive radio waves from space.