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, 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 the Univ. of Central Florida, Ana G. Méndez Univ., and Yang Enterprises under contract with the U.S. National Science Foundation. The principal instrument, the William E. Gordon Telescope, was a fixed antenna of spherical section, 1,000 ft (305 m) in diameter; long the world's largest single-dish radio telescope, it was built into a natural limestone bowl. Although the antenna was too large and heavy to be moved, it could 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 were possible up to a frequency of 4,000 MHz. Cable failures, resulting damage, and safety issues led in 2020 to a decision to decommission the radio telescope; the receiver platform subsequently collapsed. A 100-ft (30-m) satellite antenna was used in conjunction with the large antenna for interferometer observations. There also is a wide range of instrumentation for measuring ionospheric conditions. Principal research programs have included 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 ?
The Seti project uses software running as screensavers on millions of computers to sift through the data from the Arecibo telescope.
That scheme runs search programs as screensavers on millions of home computers to sift through the vast amount of data from the giant Arecibo telescope in Puerto Rico.
The Arecibo telescope must listen to the universe's "static noise" and collect and magnify that "noise" a hundredfold.
The team plan to use computer simulations to find out which of these ideas can best match the shape of the bridge that is seen with the Arecibo Telescope. The project involved three undergraduate researchers: Roberto Rodriguez and Clarissa Vazquez from UPR Humacao, and Hanna Herbst, now a graduate student at the University of Florida.
Further number-crunching would reveal a graphic of the solar system and the Arecibo telescope.
The73-row-by-23-column message depicts numbers, aspects of DNA, graphic depictions of humans, the solar system, and the Arecibo telescope.
They then combined their GBT data with that from earlier studies with other radio telescopes, including the Arecibo telescope in Puerto Rico, the Parkes telescope in Australia, and the Westerbork telescope in the Netherlands.
Each of the radar echoes, received at either the Arecibo telescope or the new Green Bank (W.
Our picture of Kleopatra, taken by the Arecibo telescope in Puerto Pico, shows the asteroid from various different angles.
The burst detected by the Arecibo telescope has three times the maximum dispersion measure that would be expected from a source within the galaxy, the scientists report.