Arecibo Observatory


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Arecibo Observatory,

radio-astronomyradio astronomy,
study of celestial bodies by means of the electromagnetic radio frequency waves they emit and absorb naturally. Radio Telescopes

Radio waves emanating from celestial bodies are received by specially constructed antennas, called radio telescopes,
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 facility located near Arecibo, Puerto Rico, that includes one of the world's largest single-dish radio telescopes, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the supervision of William E. Gordon, it was completed in 1963 and is now operated by SRI International and its partners under contract with the U.S. National Science Foundation. The principal instrument, the William E. Gordon Telescope, is a fixed antenna of spherical section, 1,000 ft (305 m) in diameter, that is built into a natural limestone bowl. Although the antenna is too large and heavy to be moved, it can be pointed as much as 20° from the zenith by moving the line feeds to the antenna's focus. As a result of the resurfacing of the antenna, which was completed in 1974, observations are possible up to a frequency of 4,000 MHz. A 100-ft (30-m) satellite antenna can be used in conjunction with the large antenna for interferometer observations. In addition there is a wide range of instrumentation for measuring ionospheric conditions. Principal research programs include studies of radio emissions from many types of objects, especially the cores of supernovas called pulsars; radar studies of comets and asteroids; and ionospheric studies.
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References in periodicals archive ?
It is eyeing to break the record of Puerto Rico's 300-meter Arecibo Observatory as the world's largest radio telescope.
When it is completed in 2016, the five hundred meter aperture spherical telescope (FAST) will be the world's largest, overtaking Puerto Rico's Arecibo Observatory, which is only 300 meters in diameter.
It was a short message from the Arecibo Observatory in Puerto Rico, and it was aimed at a star cluster called Messier 13.
The Goldstone radar team paired with the Arecibo Observatory (Goldstone sending radar, Arecibo receiving) for the first five frames of this movie in order to collect higher quality data resulting in shaper images.
The Arecibo Observatory in Puerto Rico planned a viewing Tuesday when the asteroid is set to make its closest pass at a distance of 202,000 miles (325,072 kilometers) at 6:28 p.m.
A German and an American couple participating in the Einstein@ Home programme has made the first deep- space discovery : a new radio pulsar hidden in data gathered by the Arecibo Observatory in Puerto Rico.
"For many pulsar experiments, this range could be considered to be the optimum frequency," says Chris Salter, an astronomer at Arecibo Observatory in Puerto Rico.
Outside the city there are mountain ranges, rainforests, excellent beaches and the Arecibo Observatory, the world's largest radio telescope, which scans the universe for signs of life (it's open to visitors).
The impending study does not mean the complex will close entirely--at least not immediately, said Richard Barvainis, program manager of the National Astronomy and Ionosphere Center, which includes the Arecibo observatory, operated by Cornell University.
SETI is a scientific effort to determine if there is intelligent life outside Earth, primarily by using the Arecibo Observatory radio telescope in Puerto Rico to detect artificial radio signals coming from other stars.
Radar signals beamed from the Arecibo Observatory in Puerto Rico penetrated to depths of 20ft -but found no sign of thick layers of ice.