Name Established Location Abastumani Astrophysical Observatory 1932 Abastumani , Georgia Abu Reyhan-e Birooni Observatory 1976 Shiraz University , Shiraz, Iran Adirondack Public Observatory Tupper Lake, New York , US Aditya-L1 2023 Sun-Earth L1 Adolphson Observatory 2013 Monmouth, Illinois , US Airdrie Public Observatory 1896 Airdrie , Scotland, UK Aker Observatory 1995 Safford, Arizona , US Aldershot Observatory 1906 Aldershot , Hampshire , England, UK Algonquin Radio Observatory 1959 Algonquin Provincial Park , Ontario, Canada Allegheny Observatory 1859 Pittsburgh, Pennsylvania , US Ametlla de Mar Observatory 1992 l'Ametlla de Mar , Catalonia , Spain AMiBA 2006 Mauna Loa , Hawaii , US Anderson Mesa Station 1959 Flagstaff, Arizona , US Angell Hall Observatory 1927 Ann Arbor, Michigan , US Ankara University Observatory 1963 Gölbaşı, Ankara , Turkey Antarctic Muon and Neutrino Detector Array 2002 Antarctica Antarctic Submillimeter Telescope and Remote Observatory 1994–2005 Antarctica ANTARES 2008 In the Mediterranean Sea near Toulon , France Apache-Sitgreaves Observatory 2005 Overgaard, Arizona , US Apache Point Observatory 1985 Sunspot, New Mexico , US Apatity Cosmic-Ray Station Apatity , Russia Apollo Observatory 1969 Dayton , Ohio , US Arcetri Observatory Arcetri , Florence , Italy Arecibo Observatory 1963 Arecibo, Puerto Rico , US Argentine Institute of Radio Astronomy 1966 Berazategui Partido , Buenos Aires Province , Argentina Armagh Observatory 1790 Armagh , UK Aryabhatta Research Institute of Observational Sciences 1954 Nainital , Uttarakhand , India Ashton Observatory 1983 Baxter, Iowa , US Asiago Astrophysical Observatory 1942 Asiago , Italy Assheton Observatory 1860 Lancashire , UK Astron (defunct) 1983–1989 Highly eccentric Earth orbit Astronomical Observatory Aurora 2011 Hechingen, Germany Astronomical Observatory of Lisbon 1867 Lisbon , Portugal Astronomy Centre 1982 Todmorden , England Astronomy Tower of the Sorbonne 1885–1909 (only for amateur use since 1980) Paris , France Astrophysical Institute Potsdam 1992 Potsdam , Germany Atacama Pathfinder Experiment (APEX) 2003 Llano de Chajnantor Observatory , Chile Australia Telescope Compact Array 1988 Narrabri , Australia Australian Astronomical Observatory 1971 Coonabarabran , Australia Badlands Observatory 2000 Quinn, South Dakota , US Baikal Deep Underwater Neutrino Telescope 1993 Baikal Lake , Russia Bangladesh Astronomical Observatory Archived 2020-06-09 at the Wayback Machine 2015 Dhaka , Bangladesh Baker Observatory 1980 Marshfield, Missouri , US Baksan Neutrino Observatory 1977 Prielbrusye , Baksan Valley , Russia Ball State University Observatory Muncie, Indiana , US Barnard Observatory (defunct) 1859 Oxford, Mississippi , US Bareket Observatory 1990 Maccabim , Israel Barnett Observatory 1960 Chesterfield , England , UK Bayfordbury Observatory 1969 Hertfordshire , England , UK Behlen Observatory 1972 Mead, Nebraska , US Beijing Astronomical Observatory 1958 Beijing , China Beijing Ancient Observatory 1442 Beijing , China Belgrade Observatory 1887 Belgrade , Serbia Belogradchik Observatory 1961 Belogradchik , Bulgaria Benmore Peak Observatory 1996 Mackenzie Basin , South Island , New Zealand BeppoSAX (defunct) 1996–2003 Low Earth orbit Bergisch Gladbach Observatory Bergisch Gladbach , Germany Berlin Observatory 1711 Germany Besançon Observatory 1882 Besançon , France BESS 1993 Antarctic Bidston Observatory 1849 Bidston , England , UK Big Bear Lake Solar Observatory 1969 Big Bear City, California , US Bisdee Tier Optical Astronomy Observatory 2010 Bisdee Tier, Spring Hill, Tasmania , Australia Black Moshannon Observatory (defunct) 1972 Pennsylvania , US Blackett Observatory 1930s Wiltshire , England , UK Blue Mesa Observatory (defunct) 1967 New Mexico , US Boambee Observatory 1987 Boambee, New South Wales, Australia Bohyunsan Optical Astronomy Observatory (BOAO) 1996 Youngchun, Republic of Korea BOOTES 1985 Spain Bordeaux Observatory 1878 Floirac , France Bosscha Observatory 1923 Lembang , West Java , Indonesia Boswell Observatory (defunct) 1883 Crete, Nebraska , US Bowman Observatory 1940 Greenwich, Connecticut , US Boyden Observatory 1889 Bloemfontein , South Africa Bradstreet Observatory 1996 St. Davids , Pennsylvania , US Bradley Observatory 1950 Decatur, Georgia , US Braeside Observatory (defunct) 1976 Flagstaff, Arizona , US Brera Observatory 1764 Milan , Italy Bridgewater State University Observatory 2012 Bridgewater, Massachusetts , US Brooks Observatory Toledo , Ohio , US Brooks Astronomical Observatory 1964 Mount Pleasant , Michigan , US Brorfelde Observatory Holbæk , Denmark Bucharest Observatory 1910 Bucharest , Romania Bucknell Observatory Lewisburg , Pennsylvania , US Burrell Memorial Observatory 1940 Berea, Ohio , US Byurakan Observatory 1946 Mount Aragats , Armenia Cagigal Observatory 1888 Caracas , Venezuela Cagliari Observatory 1899 Cagliari , Sardinia Calais Observatory (defunct) 1857 Calais, Maine Calar Alto Observatory 1975 Almería , Spain Caltech Submillimeter Observatory (defunct) 1986 Mauna Kea , Hawaii , US Cambridge Observatory 1823 Cambridge , UK Camille Flammarion Observatory 1883 Juvisy-sur-Orge , France Campbelltown Rotary Observatory 2000 Campbelltown , NSW , Australia Campo Imperatore Near-Earth Object Survey 2001 Campo Imperatore , Italy Canopus Hill Observatory Hobart , Tasmania , Australia Capilla Peak Observatory Albuquerque, New Mexico , US Capodimonte Observatory 1812 Naples , Italy Carter Observatory 1937 Wellington , New Zealand Catania Astrophysical Observatory Catania , Italy Cawthron Atkinson Observatory 1883 Nelson, New Zealand Celestial Observatory Russellville, Arkansas , US Centennial Observatory 2004 Twin Falls , Idaho , US Center for Astrophysics | Harvard & Smithsonian 1973 Cambridge, Massachusetts , US Cerro Armazones Observatory 1995 Atacama Desert , Chile Cerro Tololo Inter-American Observatory 1962 Atacama Desert , Chile Cerro Pachón Observatory 2000 Atacama Desert , Chile Chabot Space & Science Center 1883 Oakland, California , US Chamberlin Observatory 1890 Denver, Colorado , US Changchun Astronomical Observatory Changchun , Jilin Province, China Chandra X-ray Observatory 1999 Highly eccentric Earth orbit Chianti Polifunctional Observatory 2013 San Donato in Poggio, Florence , Italy Chico Community Observatory 2001 Chico, California , US Chilbolton Observatory 1967 Chilbolton , UK Cima Ekar Observing Station 1966 Asiago , Italy Cincinnati Observatory 1843 Cincinnati, Ohio , US City Observatory, Edinburgh 1818 Edinburgh , Scotland, UK Clarke Observatory 1897 / 1923 Dunkirk, New York / Alliance, Ohio , US Class of 1951 Observatory 1997 Poughkeepsie, New York , US Cloudcroft Observatory (defunct) 1962 New Mexico , US Coats Observatory 1883 Paisley , Scotland, UK Coit Observatory Boston, Massachusetts , US Collins Observatory 2003 Corning, New York , US Collm Observatory Leipzig , Germany Colombo University Observatory 1920s Colombo , Sri Lanka Compton Gamma-Ray Observatory (defunct) 1991–2000 Low earth orbit ÇOMÜ Ulupınar Observatory 2002 Çanakkale , Turkey Concordia College Observatory Moorhead, Minnesota , US Consell Observatory 1987 Majorca , Spain Copenhagen University Observatory 1861 Copenhagen , Denmark Cordell–Lorenz Observatory Sewanee, Tennessee , US COROT 2006 Polar orbit Cosmic Background Imager (CBI) (defunct) 1999 Llano de Chajnantor Observatory , Chile Côte d'Azur Observatory 1988 France Crane Observatory Topeka, Kansas , US Crawford Observatory 1880 Cork , Ireland Creighton University Observatory (defunct) 1886–1955 Omaha, Nebraska , US Crimean Astrophysical Observatory 1945 Nauchnyj , Crimea Črni Vrh Observatory 1975 Idrija , Slovenia Cupillari Observatory La Plume, Pennsylvania , US Custer Observatory 1927 Southold, New York , US The Cyprus Planetarium & Observatory 2023 Nicosia , Cyprus Daniel S. Schanck Observatory (defunct) 1865 Rutgers University , New Brunswick, New Jersey , US Daniel Scholl Observatory (defunct) 1886–1966 Lancaster, Pennsylvania , US Daocheng Solar Radio Telescope 2022 Daocheng County, Garze Tibetan Autonomous Prefecture, Sichuan Province, China. Dark Sky Observatory 1981 Phillips Gap, Wilkes County, North Carolina , US Dark Matter Particle Explorer (DAMPE) 2015 500 km LEO Darling's Observatory (defunct) 1917 Duluth, Minnesota , US Dearborn Observatory 1889 Evanston, Illinois , US Detroit Observatory 1854 Ann Arbor, Michigan , US David Dunlap Observatory 1935 Richmond Hill, Ontario , Canada Dome C Antarctica Dominion Observatory 1905 Ottawa , Ontario , Canada Dominion Astrophysical Observatory 1918 Saanich, British Columbia , Canada Dominion Radio Astrophysical Observatory 1960 Kaleden, British Columbia , Canada Dunsink Observatory 1785 Dublin , Ireland Durham University Observatory 1839 Durham , UK Dyer Observatory 1953 Brentwood, Tennessee , US Effelsberg 100-m Radio Telescope 1972 Bonn , Germany Ege University Observatory 1965 Kemalpaşa , İzmir , Turkey Einstein Probe 2024 Low Earth orbit Einstein Observatory (defunct) 1978 Low Earth orbit Elginfield Observatory 1969 Middlesex Centre, Ontario , Canada Ellis Observatory 2004 Sterling Hill Mining Museum , Ogdensburg, New Jersey , US Embry-Riddle Observatory 2005 Daytona Beach , Florida , US Eskdalemuir Observatory 1908 Dumfries and Galloway , Scotland, UK European Gravitational Observatory 2003 Cascina , Italy Euclid Telescope 2023 Earth–Sun L2 Lagrangian point European Southern Observatory 1962 1969 1989 2005 1998 1999 2026 Atacama Desert , Chile Fabra Observatory 1906 Barcelona , Spain Fan Mountain Observatory 1966 Albemarle County , Virginia , US Five-hundred-meter Aperture Spherical Radio Telescope 2013 Duyun , Pingtang County, Guizhou Province, China Félix Aguilar Observatory 1965 San Juan, Argentina Fernbank Observatory Atlanta, Georgia , US Fermi Gamma-ray Space Telescope 2008 Orbit Fick Observatory 1966 Boone, Iowa , US Five College Radio Astronomy Observatory (defunct) 1976–2011 New Salem, Massachusetts , US Flarestar Observatory San Gwann , Malta Foggy Bottom Observatory 1951 Hamilton, New York , US Foothill Observatory Los Altos Hills, California , US Ford Observatory 1998 Ithaca , New York , US Fox Observatory Sunrise, Florida , US Fox Park Public Observatory 1999 Potterville, Michigan , US Francis Marion University Observatory 1982 Florence, South Carolina , US Fred Lawrence Whipple Observatory 1968 Mount Hopkins, Arizona , US Fremont Peak Observatory 1986 San Juan Bautista, California , US Frosty Drew Observatory 1980s Charlestown, Rhode Island , US Fuertes Observatory 1917 Ithaca, New York , US Galaxy Evolution Explorer (GALEX ) 2003 Caltech , Jet Propulsion Laboratory , California, US Gaocheng Astronomical Observatory 1276 Dengfeng , Henan , China Gauribidanur Radio Observatory 1976 Gauribidanur , Karnataka , India Gemini Observatory 1999 Southern Operations Center: La Serena , Chile; Northern Operations Center: Hilo, Hawaii , US George Observatory 1989 Brazos Bend State Park , near Houston, Texas , US Giant Meterwave Radio Telescope (GMRT) 1995 Pune , Maharashtra , India Gifford Observatory 1912 Wellington , New Zealand Girawali Observatory 2006 Pune , Maharashtra , India Glen D. Riley Observatory 1973 Naperville, Illinois , US Godlee Observatory 1902 Manchester , England, UK Goodsell Observatory 1887 Northfield, Minnesota , US Goethe Link Observatory 1939 Brooklyn, Indiana , US Goldendale Observatory 1973 Goldendale, Washington , US Gornergrat (HFSJG) (defunct) 1967–2005 Gornergrat , Switzerland Granat (defunct) 1989–1999 Highly eccentric Earth orbit Gran Telescopio Canarias 2006 Canary Islands , Spain Grant O. Gale Observatory 1984 Grinnell, Iowa , US Green Bank Telescope Green Bank, West Virginia , US Green Point Observatory 1961 Sutherland, New South Wales , Australia Grenfell Observatory 2012 Corner Brook, Newfoundland and Labrador , Canada Griffith Observatory 1935 Los Angeles, California , US Guillermo Haro Observatory 1972 Cananea , Sonora , Mexico Gyarah Sidi Agra , Uttar Pradesh , India HALCA (defunct) 1997–2005 Elliptical earth-centered orbit Haleakala Observatory Maui, Hawaii , US Halley Observatory 1987 Heesch , Netherlands Hamburg Observatory 1803 Hamburg , Germany Hat Creek Radio Observatory 1950s Shasta County, California , US Hard Labor Creek Observatory Atlanta , Georgia , US Space Hard X-Ray Modulation Telescope (HXMT) 2017 550 km LEO Hartung–Boothroyd Observatory 1974 Ithaca, New York , US Hartebeesthoek Radio Astronomy Observatory 1961 Gauteng , South Africa Hartwell House 1831 Hartwell , Buckinghamshire, UK Harvard College Observatory 1839 Cambridge, Massachusetts , US Haute-Provence Observatory 1937 Alpes-de-Haute-Provence , France Haystack Observatory 1964 Westford, Massachusetts , US Hector J Robinson Observatory 1964 Lincoln Park, Michigan , US Helium and Lead Observatory 2012 Sudbury, Ontario , Canada Helmos Observatory 2007 Mount Helmos , Greece Helsinki University Observatory 1834 Helsinki /Kirkkonummi , Finland Herrett Observatory 2004 Twin Falls, Idaho , US Herschel Space Observatory 2009 Earth–Sun L2 point Hidden Valley Observatory 1960s Rapid City, South Dakota , US Hida Observatory, Kyoto University 1968 Takayama, Gifu, Japan Heyden Observatory , Georgetown University 1844 Washington, D.C. , US High Altitude Water Cherenkov Observatory 2015 Sierra Negra , Puebla , Mexico High Energy Stereoscopic System 2002 Khomas Region , Namibia Highland Road Park Observatory 1997 Baton Rouge , Louisiana , US Hinode 2006 Low Earth orbit Hirsch Observatory 1942 Troy, New York , US Hobbs Observatory 1974 Fall Creek, Wisconsin , US Hoher List Observatory 1954 Daun, Germany Holcomb Observatory and Planetarium 1954 Indianapolis, Indiana , US Hong Kong Observatory 1883 Tsim Sha Tsui , Kowloon , Hong Kong Hoober Observatory 1993 Rotherham , UK Hopkins Observatory 1838 Williamstown, Massachusetts , US Howell Observatory Starkville, Mississippi , US Hradec Králové Observatory 1961 Hradec Králové , Czech Republic Huairou Solar Observing Station Beijing , China Hubble Space Telescope 1990 Low Earth orbit Huggins Observatory defunct 1856 London , England, UK Hume Cronyn Memorial Observatory 1940 London, Ontario , Canada Hyde Memorial Observatory 1977 Lincoln, Nebraska , US IceCube Neutrino Observatory 2010 Amundsen–Scott South Pole Station Indian Astronomical Observatory 2001 Hanle , Ladakh , India Insperity Observatory 2008 Humble, Texas, US Instituto de Astrofísica de Canarias 1975 Canary Islands , Spain INTEGRAL 2002 Highly eccentric Earth orbit Infrared Astronomical Satellite (IRAS) (defunct) January–November 1983 Earth orbit Infrared Space Observatory (ISO) (defunct) 1995–1998 Earth orbit Innsbruck Observatory Innsbruck , Austria IRAM 30m telescope 1984 Pico Veleta , Spain IRAM Plateau de Bure Interferometer 1988 Gap, Hautes-Alpes , France Iranian National Observatory 2017 Mount Gargash , Iran Isaac Newton Group of Telescopes 1979 La Palma , Spain Isasc Roberts' Observatory (defunct) 1890 Crowborough , UK Iso-Heikkilä Observatory (defunct) 1935 (only amateur use since 1972) Turku , Finland Constantinople Observatory of Taqi ad-Din 1577 Constantinople , Turkey Istanbul University Observatory 1936 Istanbul , Turkey Istituto Ricerche Solari Locarno, IRSOL 1960 Locarno , Switzerland IXPE 2021 Earth orbit Jack C. Davis Observatory 2002 Carson City, Nevada , US Astronomical Observatory of the Jagiellonian University 1792 Kraków , Poland James Clerk Maxwell Telescope 1987 Mauna Kea , Hawaii , US James Gregory Telescope 1962 St. Andrews , UK James Webb Space Telescope 2021 Earth–Sun L2 Lagrangian point James Wylie Shepherd Observatory 2009 Montevallo , Alabama , US Jakarta Observatory 1968 Jakarta , Indonesia Jantar Mantar 1727 Jaipur , Rajasthan , India Jena Observatory 1962 Jena , Germany Jewett Observatory 1953 Pullman, Washington , US Jodrell Bank Observatory 1945 Cheshire , England, UK JAC Johor Astronomy 2014 Johor , Malaysia Jones Observatory 1936 Chattanooga , Tennessee , US Judson B. Coit Observatory Boston, Massachusetts , US KAIRA 2011 Kilpisjarvi , Finland Khajeh Nasiredin Observatory ~1980 Tabriz University , Tabriz , Iran Kamioka Observatory 1983 Hida , Gifu , Japan Kanzelhoehe Solar Observatory 1943 Villach , Austria Karl Schwarzschild Observatory 1960 Jena , Germany Keck Observatory 1993 Mauna Kea , Hawaii , US Keeble Observatory 1963 Ashland, Virginia , US Keele Observatory 1962 Keele University , England, UK Kennon Observatory 1939 Oxford, Mississippi , US Kepler Space Observatory 2009 Earth-trailing heliocentric orbit Kevola Observatory 1963 Kevola, Finland Kielder Observatory 2008 Kielder Forest , Northumberland , England, UK King's Observatory (defunct) 1769 Greater London , England, UK Kirkwood Observatory 1901 Bloomington, Indiana , US Kitami Observatory Hokkaidō , Japan Kitt Peak National Observatory 1958 Tucson, Arizona , US Kleť Observatory 1957 České Budějovice , Czech Republic Kodaikanal Solar Observatory 1899 Palani , Tamil Nadu , India Konkoly Observatory 1871 Budapest , Hungary Kopernik Observatory & Science Center 1974 Vestal, New York , US KOSMA observatory 1985–2010 Gornergrat , Switzerland Kottamia Astronomical Observatory 1964 Egypt Kuffner observatory 1884 Austria Kuiper Airborne Observatory (retired) 1974 14 km in the stratosphere Kwasan Observatory, Kyoto University 1929 Kyoto, Japan Kvistaberg Observatory Sweden Kyung Hee Observatory 1992 Seoul, South Korea Laboratoire d'Astrophysique de Grenoble 2001 Grenoble , France Observatorio de La Cañada (La Cañada Observatory) 2002 Ávila , Spain Ladd Observatory 1891 Providence, Rhode Island , US Lake Afton Public Observatory 1979 Wichita, Kansas , US Lamont–Hussey Observatory (defunct) 1928 Bloemfontein , South Africa Landessternwarte Heidelberg-Königstuhl 1898 Königstuhl , Heidelberg , Germany Landolt Astronomical Observatory 1939[2] Baton Rouge, Louisiana , US La Plata Astronomical Observatory 1883 La Plata , Argentina La Silla Observatory 1969 Atacama Desert , Chile Large High Altitude Air Shower Observatory (LHAASO) 2019 Daocheng County , Sichuan, China Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) 2009 Xinglong Station , Hebei, China Large Millimeter Telescope Sierra Negra , Puebla , Mexico Las Brisas Observatory 1979 Colorado , US Las Campanas Observatory La Serena, Chile Las Cumbres Observatory Global Telescope 2005 Global network Laws Observatory 1880 Columbia, Missouri , US Leander McCormick Observatory 1885 Mount Jefferson , Charlottesville , Virginia , US Lee Observatory 1873 American University of Beirut , Beirut , Lebanon Leiden Observatory 1633 Leiden University , Leiden , Netherlands Leipzig Observatory Leipzig , Germany Leoncito Astronomical Complex 1986 Calingasta , San Juan , Argentina Levenhagen Observatory Seattle, Washington , US Lick Observatory 1881 Mount Hamilton , San Jose, California , US LightBuckets (commercial observatory) 2007 Rodeo, New Mexico , US LIGO 1999 Hanford Site, Washington, US & Livingston, Louisiana, US , US Lindheimer Astrophysical Research Center (defunct) 1966–1995 Evanston, Illinois , US Llano de Chajnantor Observatory 2005 Atacama Desert , Chile Llano del Hato National Astronomical Observatory 1975 Mérida , Venezuela Lockyer Technology Centre 2010 Sidmouth , Devon , England Long Wavelength Array 2010 Socorro, New Mexico , US Longa Vista Observatory 2010 Itatiba, SP , Brazil Lowell Observatory 1894 Flagstaff, Arizona , US Lucknow (King of Oudh's) Observatory 1832–1848 Lucknow, India Lulin Observatory 1999 Mount Lulin, Taiwan Lund Observatory 1749 Lund , Sweden Luoxue Mountain Cosmic Rays Research Center 1953 Luoxue Mountain , Yunnan Province, China Lyon Observatory 1878 Saint-Genis-Laval , France Macalester College Observatory Saint Paul, Minnesota , US Macfarlane Observatory defunct 1757 Glasgow , Scotland, UK Magdalena Ridge Observatory (under construction) 2006 Socorro County, New Mexico , US Majorca Observatory 1991 Majorca , Spain Malakoff Tower 1845 Recife , Brazil Manastash Ridge Observatory 1972 Ellensburg, Washington , US Manuel Foster Observatory (defunct) 1903 Santiago, Chile Maragheh Observatory 1259 Maragheh , Iran Margaret M. Jacoby Observatory 1978 Warwick, Rhode Island , US Maria Mitchell Observatory 1908 Nantucket, Massachusetts , US Marina Towers Observatory (Not In Use) 1989 Maritime Quarter, Swansea , Wales, UK Markree Observatory (defunct) 1837 County Sligo , Ireland Marseille Observatory Marseille , France Martz Observatory Chautauqua County, New York , US Mauna Kea Observatory 1967 Mauna Kea , Hawaii , US Mauna Loa Solar Observatory Hawaii , US Maynard F. Jordan Observatory 1901 Orono, Maine , US McDonald Observatory Davis Mountains , Texas , US McKim Observatory 1884 Greencastle , Indiana , US McMath–Hulbert Solar Observatory 1930 Lake Angelus, Michigan , US MDM Observatory Kitt Peak , Arizona , US Mead Observatory 2001 Columbus , Georgia , US Medicina Radio Observatory 1965 Medicina , Bologna , Italy Mees Observatory Rochester, New York , US Mehalso Observatory Erie, Pennsylvania , US Melbourne Observatory 1862 Melbourne , Victoria , Australia Melton Memorial Observatory 1928 Columbia, South Carolina , US Mendenhall Observatory 2002 Stillwater , Oklahoma , US Menke Observatory 1994 Davenport, Iowa , US Metsähovi Observatory 1966 Kirkkonummi , Finland Meudon Observatory 1876 Meudon , France Meyer–Womble Observatory 1996 Mount Evans, Colorado , US Michigan State University Observatory 1969 East Lansing , Michigan , US Observatoire Midi-Pyrénées Headquarters: Toulouse , France Milagro 1999 Los Alamos , New Mexico , Mexico Miller Observatory 1976 Maiden , North Carolina , US Mills Observatory 1938 Dundee, Scotland, UK Mind's Eye Observatory IAU W42 2018 Sebastian , Florida , US MMT Observatory 1979 Mount Hopkins, Arizona , US Modine-Benstead Observatory 1963 Union Grove, Wisconsin , US Modra Observatory 1988 Modra , Slovakia Mohr Observatory (demolished) 1765–1780 Jakarta , Indonesia Moletai Astronomical Observatory 1969 Moletai , Lithuania Molonglo Observatory Synthesis Telescope (MOST) 1960 Bungendore , New South Wales , Australia Mont Mégantic Observatory 1978 Mont Mégantic , Québec , Canada Monterey Institute for Research in Astronomy (Oliver Observing Station ) 1972 (1984) Chews Ridge, California &Monterey, California , US Montevideo National Observatory Montevideo , Uruguay, 34°54.6′S 56°12.8′W / 34.9100°S 56.2133°W / -34.9100; -56.2133 Moore Observatory 1978 Oldham County, Kentucky , US Morgan–Monroe Observatory 1966 Morgan–Monroe State Forest , Indiana , US Morris Observatory 1973 North Manchester , Indiana , US Morrison Observatory Fayette, Missouri , US Moscow Cosmic-Ray Station Troitsk , Russia Mount Stony Brook Observatory 1968 Stony Brook , New York , US Mounds Observatory Tulsa, Oklahoma , US Mount Abu InfraRed Observatory 1995 Mount Abu , Rajasthan , India Mount Burnett Observatory 1972 Mount Burnett , Victoria , Australia Mount Cuba Astronomical Observatory Greenville, Delaware , US Mount Graham International Observatory 1993 Mount Graham , Arizona, US Mount John University Observatory 1965 Lake Tekapo , South Island , New Zealand Mount Laguna Observatory 1968 San Diego, California , US Mount Lemmon Observatory Tucson, Arizona , US Mount Pleasant Radio Observatory Tasmania , Australia Mount Stromlo Observatory 1911 Canberra , Australia Mount Suhora Observatory 1987 Poland Mount Wilson Observatory 1904 Mount Wilson , Los Angeles County, California , US Mountain Skies Observatory 1997 Lyman, Wyoming , US Mullard Radio Astronomy Observatory 1957 Cambridge , England, UK Murchison Radio-astronomy Observatory 2012 Murchison, Western Australia , Australia Nachi-Katsuura Observatory Nachikatsuura, Wakayama , Japan Nançay Radio Telescope 1965 Nançay , France Nanjing Astronomical Instruments Research Centre 1958 Nanjing , Jiangsu Province, China National Astronomical Observatory (Colombia) 1803 Bogotá, Colombia National Astronomical Observatory of Japan 1988 Headquarters: Mitaka, Tokyo , Japan National Astronomical Observatory (Mexico) 1967 Sierra San Pedro Mártir , Baja California , Mexico National Observatory (Brazil) 1827 Rio de Janeiro , Brazil National Observatory of Athens 1842 Athens , Greece National Optical Astronomy Observatory 1982 Headquarters: Tucson, Arizona , US National Optical Observatory Turkey National Radio Astronomy Observatory 1957 Headquarters: Charlottesville, Virginia , US National Research Institute of Astronomy and Geophysics (NRIAG) 1903 Helwan , Egypt National Solar Observatory 1952 Sunspot, New Mexico , US & Kitt Peak , Arizona, US Naval Research Lab. Radio Sta. Sugar Grove , West Virginia, US 38°31.2′N 79°16.4′W / 38.5200°N 79.2733°W / 38.5200; -79.2733 Naylor Observatory 1971 Harrisburg , Pennsylvania , US Neuchâtel Observatory 1858 Neuchâtel , Switzerland Nice Observatory 1879 Nice, France Nizamia Observatory 1907 Hyderabad , India Nordic Optical Telescope 1988 Canary Islands , Spain Norilsk Cosmic-Ray Station Norilsk , Krasnoyarsk Krai , Russia Norman Lockyer Observatory 1912 Sidmouth , UK Northern Arizona University Observatory Flagstaff, Arizona , US Northern Skies Observatory 2009 Peacham, Vermont , US Northolt Branch Observatory 2015 London , England, UK Northolt Branch Observatory 2, Shepherd's Bush 2016 London , England, UK Northolt Branch Observatory 3, Blandford Forum 2017 London , England, UK North Georgia Astronomical Observatory Dahlonega , Georgia , US North Otago Astronomical Society Observatory Oamaru , South Island , New Zealand Nyrölä Observatory 1997 Jyväskylän maalaiskunta , Western Finland Province, Finland OAC (Observatorio Astronómico de Córdoba) 1871 Córdoba , Argentina OAO (Observatorio de Aras de los Olmos) 2008 Aras de los Olmos , Valencia , Spain O'Brien Observatory 1961 Marine on St. Croix, Minnesota , US Observatoire du Pic de Château-Renard 1974 Saint-Véran , France Observatorio Astronómico Nacional (Colombia) 1803 Bogotá, Colombia Observatorio Astronomico Nacional Tonantzintla 1961 Tonantzintla , Mexico Observatorio Solar Carl Sagan 2000 Hermosillo , Sonora , Mexico Observatory House (defunct) 1789 Slough , UK Observatory of the rue Serpente (defunct) 1890–1968 Paris , France Oil Region Astronomical Observatory Venango County , Pennsylvania , US Onan Observatory 1990 Norwood Young America, Minnesota , US Ondokuz Mayıs University Observatory 2006 Samsun , Turkey Ondřejov Observatory 1898 Ondřejov , Czech Republic Onsala Space Observatory 1949 Onsala , Sweden Ooty Radio Telescope 1970 Ooty , Tamil Nadu , India Orchard Hill Observatory 1965 Amherst, Massachusetts , US Orioloromano Observatory 2007 Oriolo Romano , Italy Orion 1 (defunct) 1971 Low Earth orbit Orion 2 (defunct) 1973 Low Earth orbit Orion Ranch Observatory 2009 Bertram, Texas , US Orwell Park School Observatory 1848 Nacton , UK Ostrowik Observatory 1952 Ostrowik , Poland Otter Creek Observatory 1995 Meade County, Kentucky , US Oulu Cosmic-Ray Station Oulu , Finland Owens Valley Radio Observatory 1958 Bishop, California , US Pachmarhi Array of Cerenkov Telescopes (PACT) 1986 Pachmarhi , Madhya Pradesh , India Palisades-Dows Observatory 1987 Cedar Rapids, Iowa , US PAGASA Astronomical Observatory 1954 Quezon City , Philippines Palermo Observatory 1790 Palermo, Sicily , Italy Palomar Observatory 1948 Palomar Mountain , California , US Panzano Observatory 1640 Bologna , Italy Paranal Observatory 1999 Cerro Paranal , Atacama desert , Chile Paris Observatory 1667 Paris, France Parkes Observatory 1961 Parkes , Australia Paul Robinson Observatory 1965 High Bridge, New Jersey , US Peach Mountain Observatory 1950 Dexter, Michigan , US Perkins Observatory 1931 Delaware, Ohio , US Perth Observatory 1896 Perth, Australia Peterberg Observatory 1977 Saarland , Germany Pic du Midi Observatory 1878 Pic du Midi , Pyrenees , France Pico dos Dias Observatory 1981 Minas Gerais , Brazil Piera Observatory 1968 Barcelona , Spain Pierre Auger Observatory 2004 Malargüe , Argentina Pine Bluff Observatory 1958 Cross Plains, Wisconsin , US Pine Mountain Observatory 1965 Bend, Oregon , US Pistoia Mountains Astronomical Observatory 1990 Pian dei Termini (near San Marcello Pistoiese ), Italy Piwnice Ovservatory 1945 Piwnice near Toruń, Poland Planetarium and Astronomical Observatory in Grudziądz 1972 Grudziądz, Kujawsko-Pomorskie , Poland Pollock Astronomical Observatory 2004 Hunting Valley, Ohio , US Portage Lake Observatory (defunct) 1948 Dexter, Michigan , US Poznań Observatory 1919 Poznań , Poland Prishtina Observatory 1997 Pristina Municipality , Kosovo Puckett Observatory 1977 Ellijay, Georgia , US Pula Observatory 1869 Pula , Croatia Pulkovo Observatory 1839 Pulkovskiye Heights , Russia Purple Mountain Observatory 1929 Nanjing , Jiangsu Province, China Queqiao 2018 Earth-Moon L2 Queqiao-2 2024 Lunar orbit Quito Astronomical Observatory 1873 La Alameda Park, Quito , Ecuador Radcliffe Observatory 1772 Oxford , England. Moved to Durban , South Africa in 1939 Rainwater Observatory French Camp, Mississippi , US Ralph A. Worley Observatory 1964 Shreveport, Louisiana , US Rankin Science Observatory 1963 Appalachian State University , Boone, North Carolina , US Rancho Mirage Library and Observatory 2018 Rancho Mirage, California , US Rattlesnake Mountain Observatory (defunct) 1971 Hanford Reach National Monument , Washington , US Real Instituto y Observatorio de la Armada (Spain) 1793 San Fernando, Cádiz , Spain Red Barn Observatory 2006 Ty Ty , Georgia , US Red Buttes Observatory 1994 Laramie, Wyoming , US Riley Observatory 1974 Naperville, Illinois , US RIT Observatory Rochester, New York , US Ritter Observatory Toledo , Ohio , US Robert A. Schommer Observatory Rutgers University , New Brunswick, New Jersey , US Robert Brownlee Observatory Lake Arrowhead, California , US Robinson Observatory Orlando, Florida , US Robotic Lunar Observatory (defunct) 1995 Flagstaff, Arizona , US Roger Twitchell Observatory [3] 1972 Paris, Maine , US Rogers Observatory 1981 Traverse City, Michigan , US Rolnick Observatory Westport, Connecticut , US Rome Observatory Italy Roseland Observatory 1998 St Stephen-in-Brannel , UK Rossall School Observatory Rossall , UK Rothney Astrophysical Observatory 1984 Priddis , Alberta , Canada Royal Observatory, Greenwich 1675 Greenwich , England, UK Royal Observatory, Edinburgh 1896 Edinburgh , Scotland , UK Roque de los Muchachos Observatory 1979 (officially inaugurated in 1985) La Palma , Canary Islands , Spain. Rosemary Hill Observatory Bronson, Florida , US Rozhen Observatory 1981 Peak Rozhen , Bulgaria. Rutherford Observatory 1920s New York City, New York , US San Fernando Observatory (SFO) 1976 Sylmar, California , US Sankt Andreasberg Observatory 2014 Sankt Andreasberg , Germany Sayan Spectrographic Cosmic Ray Complex Irkutsk , Russia SFA Observatory 1976 Nacogdoches, Texas , US Sagamore Hill Radio Observatory 1963 Hamilton, Massachusetts , US Shattuck Observatory 1854 Hanover, New Hampshire , US Sherwood Observatory 1972 Mansfield , UK Seven Hills Observatory 1996 Kearney, Nebraska , US Shamakhi Astrophysical Observatory 1958 Shamakhi , Azerbaijan Shanghai Astronomical Observatory 1962 Shanghai , China Sherzer Observatory 1878 Ypsilanti, Michigan , US Sheshan Astronomical Observatory 1900 Shanghai , China Siding Spring Observatory 1924 Siding Spring , New South Wales , Australia Sidmouth Observatory 1912 Sidmouth , Devon , England, UK Sierra Nevada Observatory 1981 Sierra Nevada , Spain Silesian Planetarium and Astronomical Observatory 1955 Chorzów / Katowice , Silesia , Poland Simeiz Observatory 1906 Simeiz , Crimea , Ukraine Skalnaté Pleso Observatory 1953 Vysoké Tatry , Slovakia Skinakas Observatory 1984 Crete , Greece Skylab 1973 low Earth orbit; re-entered in 1979 Smith Observatory 1880s Beloit, Wisconsin , US Smithsonian Astrophysical Observatory 1890 Cambridge, Massachusetts , US Sobaeksan Optical Astronomy Observatory 1978 Sobaeksan , South Korea Sola Fide Observatory 1990s Austin, Minnesota , US Solar and Heliospheric Observatory (SOHO) 1996 Earth–Sun L1 point Solar Space Telescope 2009 709 km SSO ; life: 3 years Sommers–Bausch Observatory 1949 Boulder, Colorado , US Sonnenborgh Observatory 1853 Utrecht , Netherlands Sonoma State Observatory 1976 Rohnert Park, California , US South African Astronomical Observatory Observatory, Cape Town , South Africa Southern Astrophysical Research Telescope (SOAR) 2004 Cerro Pachón , Chile South Pole Telescope 2007 Antarctica Spanish National Observatory 1790 (Spain) Special Astrophysical Observatory of the Russian Academy of Sciences 1966 Zelenchukskaya , near Arkhyz , Caucasus Mountains , Russia Sperry Observatory 1967 Cranford, New Jersey , US Spitzer Space Telescope 2003 Heliocentric orbit Springfield Observatory 1968 Springfield, Massachusetts , US Sproul Observatory 1911 Swarthmore, Pennsylvania , US Stardome Observatory 1967 Auckland , North Island , New Zealand Starkenburg Observatory 1970 Heppenheim , Germany Štefánik's Observatory 1928 Prague , Czech Republic Stellafane Observatory 1920 Springfield, Vermont , US Stellar Vista Observatory 2019 Kanab, Utah , US Stephens Memorial Observatory 1901 Hiram, Ohio , US Steward Observatory 1916 Tucson, Arizona , US Stickney Observatory [4] 1950s Bennington, Vermont , US Stjerneborg 1581 Hven , Sweden Stockholm Observatory 1749 Stockholm , Sweden Stokesville Observatory 1970s Virginia , US Stone Observatory 1853 Stone , Buckinghamshire , UK Stonyhurst Observatory 1838 Lancashire , England Strasbourg Observatory 1881 Strasbourg , France Stratospheric Observatory for Infrared Astronomy 2006 14 km in the stratosphere Stull Observatory 1966 Alfred, New York , US Stuttgart Observatory 1920 Stuttgart , Germany Submillimeter Array 1987 Mauna Kea , Hawaii , US St. Thomas Observatory 2009 Saint Paul, Minnesota , US Sudbury Neutrino Observatory 1999 Sudbury , Ontario , Canada Sunriver Observatory 1990 Sunriver, Oregon , US Swift Gamma-Ray Burst Mission 2004 Low Earth orbit Swiss Observatory Polychron and Astronomy 2019 Geneva, Switzerland Sydney Observatory 1858 Sydney , Australia Table Mountain Observatory Angeles National Forest , Wrightwood , California , US Tacubaya Observatory 1882 Tacubaya , Mexico City , Mexico Taeduk Radio Astronomy Observatory 1986 Taejon , South Korea Tamke-Allan Observatory 1998 Roane County , Tennessee , US Tartu Observatory 1964 Tartumaa , Estonia Teide Observatory 1964 Tenerife , Canary Islands , Spain Ten Acre Observatory Tribbey, Oklahoma , US Terskol Peak Observatory 1989 Terskol, Kabardino-Balkaria , Russia Thai National Observatory 2013 Doi Inthanon , Chiang Mai , Thailand The Dam Observatory 2017 Lake Tschida , North Dakota , US The Heights Observatory 1989 The Heights School , South Australia , Australia Texas A&M Astronomical Observatory College Station, Texas , US Theodore Jacobsen Observatory 1895 Seattle, Washington , US Thompson Observatory 1968 Beloit, Wisconsin , US Tien Shan Astronomical Observatory Almaty , Kazakhstan Tuorla Observatory 1952 Piikkiö , Finland Trieste Observatory Trieste , Italy Troodos Observatory 2023 Agridia , Troodos Mountains , Cyprus Trottier Observatory 2015 Simon Fraser University , Burnaby , Canada Turin Observatory 1759 Pino Torinese , Italy Udaipur Solar Observatory Udaipur, Rajasthan , India Ukrainian T-shaped Radio telescope, second modification 1972 Shevchenkove , Ukraine Ulugh Beg Observatory 1420s Samarkand , Uzbekistan University of Alabama Observatory 1950 Tuscaloosa, Alabama , US University of Alabama Observatory (Old) 1849–1890s Tuscaloosa, Alabama , US University of North Alabama Observatory Florence, Alabama , US University of Illinois Astronomical Observatory 1896 Urbana, Illinois , US University of London Observatory 1929 London, England, UK University of Maryland Observatory College Park, Maryland , US University of Michigan-Dearborn Observatory 2007 Dearborn, Michigan , US University of New Hampshire Observatory 1985 Durham, New Hampshire , US University of Oklahoma Observatory Norman, Oklahoma , US University of Puerto Rico at Humacao Observatory [5] 1985 Humacao, Puerto Rico , US University of Valencia Astronomical Observatory 1909 Valencia , Spain Uppsala Astronomical Observatory 1741 Uppsala , Sweden Urania (Antwerp) Hove, Belgium Urania (Berlin) Berlin, Germany Urania (Vienna) 1909 Vienna , Austria Urania Observatory (Zürich) 1907 Zürich , Switzerland Uraniborg 1572–1597 (demolished) Hven , Sweden Urumqi Astronomical Observatory 1957 Urumqi , Xinjiang , China U.S. Naval Observatory (USNO) [6] 1844 Washington, D.C. , US Valongo Observatory 1881 Rio de Janeiro , Brazil Vainu Bappu Observatory 1968 Kavalur , Tamil Nadu , India Astronomical observatory of Aosta Valley 2003 Nus, Aosta Valley , Italy Van Vleck Observatory 1914 Middletown, Connecticut , US Vanderbilt University Observatory Nashville, Tennessee , US Vartiovuori Observatory (defunct) 1819–1834 Turku , Finland Vassar College Observatory (defunct) 1865 Poughkeepsie, New York , US Vatican Observatory 1891 Headquarters: Castel Gandolfo , Italy Veen Observatory 1970 Lowell , Michigan , US Vega–Bray Observatory 1990 Benson, Arizona , US Ventspils Starptautiskais Radioastronomijas Centrs Irbene , Latvia Vernonia Peak Observatory Vernonia, Oregon , US Very Large Array 1980 Socorro, New Mexico , US Very Long Baseline Array 1993 Various locations Vienna Observatory 1753 Vienna , Austria Vilnius University Observatory 1753 Vilnius University , Lithuania Višnjan Observatory 1978 Višnjan , Croatia Vsetín Observatory 1950 Vsetín , Czech Republic Warkworth Radio Observatory 2008 Warkworth, New Zealand Warner Observatory (defunct) 1882 Rochester , New York , US Warner and Swasey Observatory 1919 Cleveland , Ohio , US Warren Rupp Observatory 1985 Mansfield , Ohio , US Warsaw University Observatory 1825 Warsaw, Poland Washburn Observatory 1881 Madison, Wisconsin , US Wast Hills Observatory 1982 Birmingham , England , UK Weaver Student Observatory 1998 Monterey, California , US Weitkamp Observatory 1955 Westerville , Ohio , US West Mountain Observatory 1981 West Mountain, Utah , US Whakatane Astronomical Society 1964 Whakatane , New Zealand Whitin Observatory 1901 Wellesley, Massachusetts , US Widener University Observatory 2004 Chester, Pennsylvania , US Wilder Observatory 1903 Amherst, Massachusetts , US Willard L. Eccles Observatory 2009 Frisco Peak , Utah , US William Brydone Jack Observatory 1851 Fredericton , New Brunswick , Canada Williams Observatory 1990 Boiling Springs , North Carolina , US Winer Observatory 1983 Sonoita, Arizona , US Winfree Observatory 1900 Lynchburg , Virginia , US Wise Observatory 1971 Negev , Israel Witte Observatory 1984 Mediapolis, Iowa , US WIYN Observatory 1994 Kitt Peak , Arizona, US Wyoming Infrared Observatory 1975 Laramie, Wyoming , US Xiangfen Astronomical Observatory 2100 BCE Xiangfen County , Linfen , Shanxi Province, China Xinglong Station (NAOC) Xinglong County , Chengde , Hebei province, China[7] Xinjiang Astronomical Observatory 1968 Urumqi , Xinjiang , China XMM-Newton 1999 Highly eccentric Earth orbit XRISM 2023 Earth orbit XPoSat 2024 Earth orbit Xujiahui Astronomical Observatory 1872 Shanghai , China Arctic Space Weather Center Yakutsk , Russia Yale Student Observatory New Haven, Connecticut , US Yangbajing International Cosmic-Ray Observatory Yangbajing Valley, Tibet , China Yantra Mandir 1724 New Delhi , Delhi , India Yerevan Cosmic-Ray Station Yerevan , Armenia Yerkes Observatory 1897 Williams Bay, Wisconsin , US York University Observatory Toronto , Ontario , Canada Yuba City Astronomical Observatory 2010 Yuba City, California , US Yunnan Astronomical Observatory 1957 Kunming , Yunnan , China Zimmerwald Observatory 1956 Zimmerwald , Switzerland Zadko Observatory 2009 Gingin , Australia