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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 Farady 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
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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
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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
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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.
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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
415:
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
411:
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
402:. The zone consists of a 13,000-square-mile (34,000 km) piece of land where fixed transmitters must coordinate their emissions before a license is granted. The land was set aside by the
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On 12 May 2012, another
Atacama Large Millimeter/submillimeter Array (ALMA) antenna was carried up to the 5,000-metre plateau of Chajnantor, bringing the total on the plateau to 33.
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716:"NRAO Structural Changes: Announcing the Separation of the Green Bank Observatory and the Long Baseline Observatory"
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Science Center and the NRAO Technology Center and
Central Development Laboratory are also in Charlottesville.
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in northern Chile. This is about 40 km (25 miles) east of the historic village of
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NRAO was, until
October 2016, the operator of the world's largest fully steerable
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uncommon for radio telescopes, three 85-foot (26 m) telescopes forming the
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Federally funded research and development center for radio astronomy
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Special
Astrophysical Observatory of the Russian Academy of Science
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870:"National Radio Astronomy Observatory – Legacy Content – Tucson"
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university campus, the AOC serves as the headquarters for the
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The 300-foot telescope after collapsing on
November 15th, 1988
303:. NRAO designs, builds, and operates its own high-sensitivity
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894:
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would pioneer a campaign in
Congress to replace it with the
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Combined Array for
Research in Millimeter-wave Astronomy
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The NRAO headquarters is located on the campus of the
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that was discovered to be previously unknown natural
792:"NRAO Green Bank Site RFI Regulations for Visitors"
2187:Federally Funded Research and Development Centers
1501:Multi-Element Radio Linked Interferometer Network
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289:federally funded research and development center
244:Location of National Radio Astronomy Observatory
970:"Halfway There: 33 ALMA Antennas on Chajnantor"
1387:Canadian Hydrogen Intensity Mapping Experiment
536:
1071:
767:"National Radio Quiet Zone — Science Website"
620:, and Mark Reid. The lecture is delivered in
2222:Scientific organizations established in 1956
1377:Australian Square Kilometre Array Pathfinder
379:while he worked for Bell Labs to detect the
335:
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1171:500 meter Aperture Spherical Telescope
1078:
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170:
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83:
62:
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39:
493:, and is also the control center for the
407:directional antennas. With the advent of
293:United States National Science Foundation
1491:Molonglo Observatory Synthesis Telescope
1328:Warkworth Radio Astronomical Observatory
452:
445:, construction for which began in 1990.
427:
339:
307:for use by scientists around the world.
295:operated under cooperative agreement by
2217:Research institutes established in 1956
497:(VLBA). The ten VLBA telescopes are in
422:United States Fish and Wildlife Service
14:
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666:"National Radio Astronomy Observatory"
647:National Optical Astronomy Observatory
448:
1992:Cosmic microwave background radiation
1729:Pushchino Radio Astronomy Observatory
1451:Large Latin American Millimeter Array
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820:"300-ft telescope at Green Bank Site"
533:now operates the 12-Meter Telescope.
484:(VLA), which was the setting for the
2182:Astronomy institutes and departments
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1705:National Radio Astronomy Observatory
1599:Westerbork Synthesis Radio Telescope
670:National Radio Astronomy Observatory
281:National Radio Astronomy Observatory
34:National Radio Astronomy Observatory
2202:Radio astronomy research institutes
1697:Mullard Radio Astronomy Observatory
1085:
517:campus. NRAO formerly operated the
461:(VLA), an array of 27 dish antennas
357:Robert C. Byrd Green Bank Telescope
24:
2212:Science and technology in Virginia
1531:Northern Extended Millimeter Array
642:List of astronomical observatories
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25:
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1367:Australia Telescope Compact Array
1189:Caltech Submillimeter Observatory
1132:Very Long Baseline Interferometry
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2207:Research institutes in Virginia
1421:Giant Metrewave Radio Telescope
1289:UTR-2 decameter radio telescope
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543:Atacama Large Millimeter Array
527:Atacama Large Millimeter Array
186:Atacama Large Millimeter Array
13:
1:
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79:Associated Universities, Inc.
1971:Gravitational-wave astronomy
1549:Primeval Structure Telescope
720:Associated Universities, Inc
513:Offices were located on the
310:
297:Associated Universities, Inc
7:
2197:National Science Foundation
1883:Christiaan Alexander Muller
1749:Vermilion River Observatory
1657:Algonquin Radio Observatory
1122:Astronomical interferometer
895:"Arizona Radio Observatory"
845:"NRAO: Socorro, New Mexico"
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537:San Pedro de Atacama, Chile
10:
2248:
1223:Large Millimeter Telescope
602:Subrahmanyan Chandrasekhar
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1979:
1941:
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1511:Murchison Widefield Array
1431:Green Bank Interferometer
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1255:RATAN-600 Radio Telescope
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1138:Astronomical radio source
1093:
995:"Jansky Lecture Redirect"
531:Arizona Radio Observatory
392:National Radio Quiet Zone
387:emitted by the universe.
369:Green Bank Interferometer
361:Green Bank, West Virginia
336:Green Bank, West Virginia
326:Charlottesville, Virginia
316:Charlottesville, Virginia
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191:Green Bank Interferometer
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1713:Nançay Radio Observatory
1689:Jodrell Bank Observatory
1589:Very Long Baseline Array
1265:Sardinia Radio Telescope
495:Very Long Baseline Array
261:Related media on Commons
206:Very Long Baseline Array
1951:Submillimetre astronomy
1563:Australia, South Africa
1415:Event Horizon Telescope
691:"Maps & Directions"
474:Array Operations Center
465:The NRAO's facility in
2192:University of Virginia
1673:Green Bank Observatory
1559:Square Kilometre Array
1020:"2012 Jansky Lecturer"
476:(AOC). Located on the
462:
439:Senator Robert C. Byrd
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413:Green Bank Observatory
348:
322:University of Virginia
57:Alternative names
1966:High-energy astronomy
1853:Sebastian von Hoerner
1461:Long Wavelength Array
1407:European VLBI Network
1347:Allen Telescope Array
1247:Qitai Radio Telescope
515:University of Arizona
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431:
390:Green Bank is in the
343:
328:. The North American
299:. for the purpose of
2034:Solar radio emission
1823:Jocelyn Bell Burnell
1681:Haystack Observatory
1215:Green Bank Telescope
1199:Effelsberg Telescope
614:Jocelyn Bell Burnell
551:San Pedro de Atacama
529:(ALMA) instead. The
443:Green Bank Telescope
359:, which stands near
346:Green Bank Telescope
196:Green Bank Telescope
2177:Radio observatories
2007:Pulsar timing array
1813:Edward George Bowen
1803:Elizabeth Alexander
1665:Arecibo Observatory
1569:Submillimeter Array
1471:Low-Frequency Array
1441:Korean VLBI Network
1307:Southern Hemisphere
1218:(West Virginia, US)
949:Almaobservatory.org
924:Almaobservatory.org
503:U.S. Virgin Islands
449:Socorro, New Mexico
396:Sugar Grove Station
127:38.0368°N 78.5181°W
123: /
35:
1987:Aperture synthesis
1956:Infrared astronomy
1893:Joseph Lade Pawsey
1863:Kenneth Kellermann
1833:Nan Dieter-Conklin
1541:One-Mile Telescope
1320:Parkes Observatory
899:Aro.as.arizona.edu
519:12-Meter Telescope
463:
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33:
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2012:Radio propagation
1961:Optical astronomy
1858:Karl Guthe Jansky
1668:(Puerto Rico, US)
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1435:West Virginia, US
1184:(Puerto Rico, US)
1181:Arecibo Telescope
598:Edward M. Purcell
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2002:Odd radio circle
1980:Related articles
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1843:Cyril Hazard
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1276:(Uzbekistan)
1116:Radio window
1027:. Retrieved
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618:Frank J. Low
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389:
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72:Organization
2125:Outer space
2113:Spaceflight
2022:Wow! signal
1913:Martin Ryle
1908:Grote Reber
1838:Frank Drake
1779:(Australia)
1613:Space-based
1603:Netherlands
1475:Netherlands
1445:South Korea
1323:(Australia)
1273:Suffa RT-70
824:Gb.nrao.edu
799:Gb.nrao.edu
746:Gb.nrao.edu
555:Antofagasta
385:radio waves
377:Karl Jansky
143:Established
130: /
105:Coordinates
30:Observatory
2171:Categories
1944:EM methods
1164:telescopes
1162:Individual
829:August 17,
653:References
626:Green Bank
610:Vera Rubin
590:Fred Hoyle
486:1997 movie
179:Telescopes
146:1959
118:78°31′05″W
115:38°02′12″N
60:NRAO
2149:Education
2089:Astronomy
1928:Paul Wild
1761:Multi-use
1741:(SAORAS,
1515:Australia
1503:(MERLIN,
1495:Australia
1381:Australia
1371:Australia
1300:(Ukraine)
1292:(Ukraine)
1202:(Germany)
628:, and in
523:Kitt Peak
311:Locations
2052:Category
1888:Jan Oort
1787:(Canada)
1771:(Canada)
1724:(Sweden)
1716:(France)
1660:(Canada)
1630:Spektr-R
1473:(LOFAR,
1453:(LLAMA,
1410:(Europe)
1399:(CARMA,
1389:(CHIME,
1379:(ASKAP,
1226:(Mexico)
1210:(Russia)
1094:Concepts
1024:Nrao.edu
999:Nrao.edu
695:Nrao.edu
636:See also
409:wireless
96:Location
2161:Science
2075:Portals
2062:Commons
1601:(WSRT,
1591:(VLBA,
1551:(PaST,
1493:(MOST,
1481:MeerKAT
1423:(GMRT,
1369:(ATCA,
1359:(ALMA,
1312:HartRAO
1284:(Japan)
1268:(Italy)
1250:(China)
1242:(India)
1173:(FAST,
1126:History
1100:Units (
804:May 20,
776:May 20,
751:May 20,
726:May 20,
630:Socorro
490:Contact
469:is the
467:Socorro
291:of the
287:) is a
158:Website
1796:People
1743:Russia
1733:Russia
1634:Russia
1581:(VLA,
1571:(SMA,
1561:(SKA,
1535:France
1513:(MWA,
1463:(LWA,
1443:(KVN,
1433:(GBI,
1391:Canada
1349:(ATA,
1259:Russia
1191:(CSO,
1134:(VLBI)
1106:jansky
1029:20 May
1004:20 May
979:15 May
954:20 May
929:20 May
920:"ALMA"
904:20 May
879:20 May
854:20 May
700:20 May
675:20 May
501:, the
499:Hawaii
355:, the
254:
208:
163:public
81:
2101:Stars
1624:Japan
1620:HALCA
1553:China
1525:Italy
1425:India
1417:(EHT)
1361:Chile
1175:China
795:(PDF)
268:[
165:.nrao
2017:SETI
1784:PARL
1768:DRAO
1752:(US)
1708:(US)
1700:(UK)
1692:(UK)
1684:(US)
1676:(US)
1544:(UK)
1331:(NZ)
1234:(UK)
1153:List
1104:and
1102:watt
1031:2019
1006:2019
981:2012
956:2019
931:2019
906:2019
881:2019
856:2019
831:2022
806:2019
778:2019
753:2019
728:2019
702:2019
677:2019
583:The
541:The
457:The
373:horn
330:ALMA
285:NRAO
279:The
167:.edu
18:NRAO
521:on
400:NSA
324:in
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1593:US
1573:US
1505:UK
1193:US
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