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 |
Andrushivka Astronomical Observatory | 2001 | Andrushivka, Zhytomyr Oblast, Ukraine |
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, South 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 Astronomical 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 | Nauchnyi, 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, Antarctica |
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 |
Jordan Hall of Science | 2006 | Notre Dame, Indiana |
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, UK |
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 |
Mykolaiv Astronomical Observatory | 1821 | Mykolaiv, Mykolaiv Oblast, Ukraine |
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 |
Nieuwland Hall (Napoleon III Telescope) | 1959 | Notre Dame, Indiana, US |
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 |
Plateau Astronomique de La Couronne | 2024 | Cordes-sur-Ciel, Tarn, France |
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 Earth 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 |
Space Variable Objects Monitor | 2004 | Low Earth orbit |
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 on Earth |
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 |
University of Warsaw 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 | Whakatāne, 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 |