Largest Optical Telescopes

Largest Optical Telescopes of Today & Tomorrow
Name and location Primary-mirror aperture (meters)
European Extremely Large Telescope (proposed) 42
Thirty Meter Telescope (proposed) 30
Giant Magellan Telescope (proposed)
Cerro Las Campanas, Chile
Gran Telescopio Canarias (GTC)
La Palma, Canary Islands
Keck Telescopes
Mauna Kea, Hawaii
10.0 (×2)
Southern African Large Telescope (SALT)
Sutherland, South Africa
Hobby-Eberly Telescope (HET)
Mount Fowlkes, Texas
Large Binocular Telescope (LBT)
Mount Graham, Arizona
8.4 (×2)
Large Synoptic Survey Telescope (LSST)
Cerro Pachón, Chile
Subaru Telescope, Mauna Kea, Hawaii 8.2
Very Large Telescope, Cerro Paranal, Chile 8.2 (×4)
Frederick C. Gillett Gemini North Telescope
Mauna Kea, Hawaii
Gemini South Telescope, Cerro Pachón, Chile 8.1
MMT Observatory, Mount Hopkins, Arizona 6.5
Walter Baade and Landon Clay Telescopes (Magellan), Cerro Las Campanas, Chile 6.5 (×2)
Bolshoi Teleskop Azimultal'ny
Mount Pastukhova, Russia
Large Zenith Telescope ( (liquid mirror)
Maple Ridge, British Columbia
Hale Telescope, Palomar Mountain, California 5.0

Italics denote facilities under construction or in development.

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