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The National Radio Astronomy Observatory (NRAO) is a federally funded research and development center of the
United States National Science Foundation The U.S. National Science Foundation (NSF) is an independent agency of the United States federal government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is ...
operated under cooperative agreement by
Associated Universities, Inc Associated Universities, Inc. (AUI) is a research management corporation that builds and operates facilities for the research community. It is a not-for-profit 501(c)(3) corporation headquartered in Washington, D.C., United States. The current p ...
. for the purpose of
radio astronomy Radio astronomy is a subfield of astronomy that studies Astronomical object, celestial objects using radio waves. It started in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observat ...
. NRAO designs, builds, and operates its own high-sensitivity
radio telescope A radio telescope is a specialized antenna (radio), antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio astronomy, which studies the r ...
s for use by scientists around the world.


Locations


Charlottesville, Virginia

The NRAO headquarters is located on the campus of the
University of Virginia The University of Virginia (UVA) is a Public university#United States, public research university in Charlottesville, Virginia, United States. It was founded in 1819 by Thomas Jefferson and contains his The Lawn, Academical Village, a World H ...
in
Charlottesville, Virginia Charlottesville, colloquially known as C'ville, is an independent city (United States), independent city in Virginia, United States. It is the county seat, seat of government of Albemarle County, Virginia, Albemarle County, which surrounds the ...
. The North American ALMA Science Center and the NRAO Technology Center and Central Development Laboratory are also in Charlottesville.


Green Bank, West Virginia

NRAO was, until October 2016, the operator of the world's largest fully steerable
radio telescope A radio telescope is a specialized antenna (radio), antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio astronomy, which studies the r ...
, the Robert C. Byrd Green Bank Telescope, which stands near Green Bank, West Virginia. The observatory contains several other telescopes, among them the telescope that utilizes an
equatorial mount An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, called ''polar axis'', parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescope mount, tel ...
uncommon for radio telescopes, three telescopes forming the Green Bank Interferometer, a telescope used by school groups and organizations for small scale research, a fixed radio " horn" built to observe the radio source Cassiopeia A, as well as a reproduction of the original antenna built by
Karl Jansky Karl Guthe Jansky (October 22, 1905 – February 14, 1950) was an American physicist and radio engineer who in April 1933 first announced his discovery of radio waves emanating from the Milky Way in the constellation Sagittarius. He is consider ...
while he worked for Bell Labs to detect the
interference Interference is the act of interfering, invading, or poaching. Interference may also refer to: Communications * Interference (communication), anything which alters, modifies, or disrupts a message * Adjacent-channel interference, caused by extra ...
that was discovered to be previously unknown natural
radio waves Radio waves (formerly called Hertzian waves) are a type of electromagnetic radiation with the lowest frequencies and the longest wavelengths in the electromagnetic spectrum, typically with frequencies below 300 gigahertz (GHz) and wavelengths ...
emitted by the universe. Green Bank is in the
National Radio Quiet Zone The National Radio Quiet Zone (NRQZ) is a large area of land in the United States designated as a radio quiet zone, in which radio transmissions are restricted by law to facilitate scientific research and the gathering of military intelligence. ...
, which is coordinated by NRAO for protection of the Green Bank site as well as the
Sugar Grove Station Sugar Grove Station is a National Security Agency (NSA) communications site located near Sugar Grove, West Virginia, Sugar Grove in Pendleton County, West Virginia, Pendleton County, West Virginia. According to a 2005 article in ''The New York Time ...
monitoring site operated by the NSA. The zone consists of a piece of land where fixed transmitters must coordinate their emissions before a license is granted. The land was set aside by the
Federal Communications Commission The Federal Communications Commission (FCC) is an independent agency of the United States government that regulates communications by radio, television, wire, internet, wi-fi, satellite, and cable across the United States. The FCC maintains j ...
in 1958. No fixed radio transmitters are allowed within the area closest to the telescope. All other fixed radio transmitters including TV and radio towers inside the zone are required to transmit such that interference at the antennas is minimized by methods including limited power and using highly directional antennas. With the advent of
wireless Wireless communication (or just wireless, when the context allows) is the transfer of information (''telecommunication'') between two or more points without the use of an electrical conductor, optical fiber or other continuous guided transm ...
technology and microprocessors in everything from cameras to cars, it is difficult to keep the sites free of radio interference. To aid in limiting outside interference, the area surrounding the
Green Bank Observatory The Green Bank Observatory (previously National Radio Astronomy Observatory, Green Bank) is an Observatory, astronomical observatory located in the United States National Radio Quiet Zone, National Radio Quiet Zone in Green Bank, West Virginia, G ...
was at one time planted with pines characterized by needles of a certain length to block electromagnetic interference at the wavelengths used by the observatory. At one point, the observatory faced the problem of North American flying squirrels tagged with
United States Fish and Wildlife Service The United States Fish and Wildlife Service (USFWS or FWS) is a List of federal agencies in the United States, U.S. federal government agency within the United States Department of the Interior which oversees the management of fish, wildlife, ...
telemetry transmitters. Electric fences, electric blankets, faulty automobile electronics, and other radio wave emitters have caused great trouble for the astronomers in Green Bank. All vehicles on the premises are powered by diesel motors to minimize interference by ignition systems. Until its collapse on November 15, 1988, a 300 ft radio telescope stood at the Green Bank Observatory's unique site. It was the largest radio telescope on Earth when it was brought online for its first observation at 12:42 am on September 21, 1962. The telescope's first observation was of the remnants of Tycho's supernova that had exploded 11 November 1572. Two major overhauls installed a new surface in 1970 to correct for maintenance, snow damage, and warping from its sheer size; then a new, bigger project building was constructed in 1972 that incorporated a Faraday cage around the control room itself. The telescope stood at 240 ft in height, weighed 600 tons, had a 2-minute arc accuracy, and had a surface accuracy of ~1 inch. The collapse in 1988 was found to be due to unanticipated stresses which cracked a hidden, yet weight- and stress-supporting steel connector plate, in the support structure of the massive telescope. A cascade failure of the structure occurred at 9:43 pm, causing the entire telescope to implode. The debris from the collapse was cleared by June 1989, and West Virginia Senator Robert C. Byrd would pioneer a campaign in Congress to replace it with the
Green Bank Telescope The Robert C. Byrd Green Bank Telescope (GBT) in Green Bank, West Virginia, US is the world's largest fully steerable radio telescope, surpassing the Effelsberg 100-m Radio Telescope in Germany. The Green Bank site was part of the National Rad ...
, construction for which began in 1990.


Socorro, New Mexico

The NRAO's facility in Socorro is the Pete Domenici
Array Operations Center The Array Operations Center (AOC) in Socorro, New Mexico, is the control and monitor center for the Very Long Baseline Array. From the AOC, National Radio Astronomy Observatory operators are able to remotely control and monitor the ten VLBA tel ...
(AOC). Located on the New Mexico Tech university campus, the AOC serves as the headquarters for the
Very Large Array The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory in the southwestern United States built in the 1970s. It lies in central New Mexico on the Plains of San Agustin, between the towns of Magdalena, Ne ...
(VLA), which was the setting for the 1997 movie '' Contact'', and is also the control center for the Very Long Baseline Array (VLBA). The ten VLBA telescopes are in
Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
, the
U.S. Virgin Islands The United States Virgin Islands, officially the Virgin Islands of the United States, are a group of Caribbean islands and a territory of the United States. The islands are geographically part of the Virgin Islands archipelago and are located ...
, and eight other sites across the continental United States.


Tucson, Arizona

Offices were located on the
University of Arizona The University of Arizona (Arizona, U of A, UArizona, or UA) is a Public university, public Land-grant university, land-grant research university in Tucson, Arizona, United States. Founded in 1885 by the 13th Arizona Territorial Legislature, it ...
campus. NRAO formerly operated the 12-Meter Telescope on
Kitt Peak Kitt Peak () is a mountain in the U.S. state of Arizona, and at is the highest point in the Quinlan Mountains. It is the location of the Kitt Peak National Observatory. The radio telescope at the observatory is one of ten dishes comprising the ...
. NRAO suspended operations at this telescope and funding was rerouted to the
Atacama Large Millimeter Array The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of 66 radio telescopes in the Atacama Desert of northern Chile, which observe electromagnetic radiation at millimeter and submillimeter wavelengths. The ar ...
(ALMA) instead. The Arizona Radio Observatory now operates the 12-Meter Telescope.


San Pedro de Atacama, Chile

The
Atacama Large Millimeter Array The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of 66 radio telescopes in the Atacama Desert of northern Chile, which observe electromagnetic radiation at millimeter and submillimeter wavelengths. The ar ...
(ALMA) site in Chile is at ~ altitude near Cerro Chajnantor in northern Chile. This is about east of the historic village of
San Pedro de Atacama San Pedro de Atacama is a Chilean town and commune in El Loa Province, Antofagasta Region. It is located east of Antofagasta, some 106 km (60 mi) southeast of Calama and the Chuquicamata copper mine, overlooking the Licancabur volcan ...
, southeast of the mining town of Calama, and about east-northeast of the coastal port of
Antofagasta Antofagasta () is a port city in northern Chile, about north of Santiago. It is the capital of Antofagasta Province and Antofagasta Region. According to the 2015 census, the city has a population of 402,669. Once claimed by Bolivia follo ...
.


Jansky Prize

The Karl G. Jansky Lectureship is a prestigious lecture awarded by the board of trustees of the NRAO. The Lectureship is awarded "to recognize outstanding contributions to the advancement of radio astronomy." Recipients have included
Fred Hoyle Sir Fred Hoyle (24 June 1915 – 20 August 2001) was an English astronomer who formulated the theory of stellar nucleosynthesis and was one of the authors of the influential B2FH paper, B2FH paper. He also held controversial stances on oth ...
,
Charles Townes Charles Hard Townes (July 28, 1915 – January 27, 2015) was an American physicist. Townes worked on the theory and application of the maser, for which he obtained the fundamental patent, and other work in quantum electronics associated with b ...
, Edward M. Purcell,
Subrahmanyan Chandrasekhar Subrahmanyan Chandrasekhar (; 19 October 1910 – 21 August 1995) was an Indian Americans, Indian-American theoretical physicist who made significant contributions to the scientific knowledge about the structure of stars, stellar evolution and ...
, Philip Morrison, Vera Rubin,
Jocelyn Bell Burnell Dame Susan Jocelyn Bell Burnell (; Bell; born 15 July 1943) is a Northern Irish physicist who, as a doctoral student, discovered the first radio pulsars in 1967. This discovery later earned the Nobel Prize in Physics in 1974, but she was not ...
, Frank J. Low, and Mark Reid. The lecture is delivered in
Charlottesville Charlottesville, colloquially known as C'ville, is an independent city in Virginia, United States. It is the seat of government of Albemarle County, which surrounds the city, though the two are separate legal entities. It is named after Quee ...
, Green Bank, and in Socorro.


See also

*
List of astronomical observatories This is a partial list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location. The list also includes a final year of operation for many observatories that are no lon ...
* National Optical Astronomy Observatory


References


External links

* {{Authority control Radio observatories Astronomy institutes and departments Federally Funded Research and Development Centers University of Virginia National Science Foundation Radio astronomy research institutes Research institutes in Virginia Science and technology in Virginia Research institutes established in 1956 Scientific organizations established in 1956 1956 establishments in Virginia Organizations based in Virginia