Anglo-Australian Observatory
Anglo-Australian Telescope
Algonquin Radio Observatory
Allegheny Observatory
Apache Point Observatory
Arcetri Astrophysical Observatory
Arecibo Observatory
Arecibo Radio Telescope
Asiago Astrophysical Observatory
Atacama Large Millimeter Array (ALMA)
Australia Telescope National Facility (ATNF)
Allen Telescope Array (ATA)

Big Bear Solar Observatory
Bol'shoi Teleskop Azimultal'nyi
Byurakan Astrophysical Observatory

Caltech Submillimeter Observatory
Canada-France-Hawaii Telescope
Center for Astronomical Adaptive Optics
Cerro Tololo Inter-American Observatory
Crimean Astrophysical Observatory

Dominion Astrophysical Observatory

Effelsberg Radio Observatory
European Southern Observatory
extremely large telescope

Gemini Observatory
Giant Magellan Telescope
Global Oscillation Network Group
Gran Telescopio Canarias
Green Bank
Green Bank Telescope
Griffith Observatory

Hale Observatories
Hale Telescope
Harvard College Observatory
Harvard-Smithsonian Center for Astrophysics
Harvard-Smithsonian Radio Telescope
Hat Creek Radio Observatory
Haut-Provence Observatory (Observatoire de Haut-Provence)
Haystack Observatory
Hobby-Eberly Telescope
Hubble Space Telescope

Infra-Red Telescope Facility

James Clerk Maxwell Telescope
Jodrell Bank Observatory
Joint Astronomy Centre

Keck Observatory
Kitt Peak National Observatory
Kuiper Airborne Observatory

La Silla Observatory
Large Binocular Telescope
Large Millimeter Telescope
Large Southern Array
Las Campanas Observatory
Leonhard Euler Telescope
Leuschner Observatory
Lick Observatory
LINEAR (Lincoln Near Earth Asteroid Research) program
Lovell Telescope
Lowell Observatory

Magellan Telescope
Mauna Kea observatories
Mayall Telescope
McDonald Observatory
McMath-Pierce Solar Telescope
Meudon Observatory
Minor Planet Center
Mopra Telescope
Mount Graham International Observatory
Mount Stromlo and Siding Spring Observatories
Mount Wilson Observatory
Multiple Mirror Telescope (MMT)

National Optical Astronomy Observatories
National Radio Astronomy Observatory
National Solar Observatory
Near-Earth Asteroid Tracking
Nobeyama Radio Observatory

Oak Ridge Observatory
Ohio State University Radio Observatory
Optical Gravitational Lensing Experiment
Optical Very Large Array
OverWhelmingly Large Telescope
Owens Valley Radio Observatory

Palomar Observatory
Paranal Observatory
Paris Observatory
Parkes Observatory
Paul Wild Observatory
Pic-du-Midi Observatory
Probing Lensing Anomalies Network
Project 1640

Roque de los Muchachos Observatory
Royal Greenwich Observatory

Sacramento Peak Observatory
Smithsonian Astrophysical Observatory
Siding Spring Observatory
Siding Spring Survey
SOFIA (Stratospheric Observatory for Infrared Astronomy)
South African Large Telescope
Spacewatch Project
Special Astrophysical Observatory
Sproul Observatory
Sternberg State Astronomical Institute
Steward Observatory
Subaru Telescope
Submillimeter Array
Submillimeter Telescope Observatory
Sudbury Neutrino Observatory

United Kingdom Infrared Telescope
United Kingdom Schmidt Telescope
US Naval Observatory

Very Large Array
Very Large Telescope
Very Long Baseline Array

Westerbork Synthesis Radio Telescope
Whipple (Fred Lawrence) Observatory
William Herschel Telescope
WIYN Telescope
WorldWide Telescope

Yerkes Observatory