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Great Observatories in the World
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Hubble Space Telescope
Orbit around Earth; Key Instruments - Wide Field Camera 3, Cosmic Origins Spectrograph; Key Discovery - Accelerating expansion of the universe
Atacama Large Millimeter/submillimeter Array (ALMA)
Chajnantor plateau, Atacama Desert, Chile; Key Instruments - 66 high-precision antennas; Key Discovery - Detailed observations of star formation
Mauna Kea Observatories
Mauna Kea, Hawaii, USA; Key Instruments - Keck I and Keck II telescopes; Key Discovery - Supermassive black holes in distant galaxies
Very Large Telescope (VLT)
Cerro Paranal, Atacama Desert, Chile; Key Instruments - Four optical telescopes named Antu, Kueyen, Melipal, and Yepun; Key Discovery - Observation of first image of an extrasolar planet
James Clerk Maxwell Telescope (JCMT)
Mauna Kea, Hawaii, USA; Key Instrument - 15-meter diameter submillimeter wavelength radio telescope; Discovery - Study of interstellar dust and gas
Spitzer Space Telescope
Orbit around Earth; Key Instruments - Infrared Array Camera, Multiband Imaging Photometer; Key Discovery - Detailed mapping of the cosmic infrared background
Event Horizon Telescope (EHT)
Global collaboration; Key Instruments - Network of radio telescopes across multiple sites; Key Discovery - First direct image of a black hole's event horizon
Paranal Observatory
Cerro Paranal, Atacama Desert, Chile; Key Instruments - Very Large Telescope (VLT), VLT Survey Telescope; Key Discovery - Direct imaging of exoplanets
Palomar Observatory
Palomar Mountain, California, USA; Key Instruments - Hale Telescope, Oschin Schmidt Telescope; Key Discovery - Numerous asteroids and comets
South Pole Telescope
Amundsen-Scott South Pole Station, Antarctica; Key Instrument - 10-meter diameter microwave telescope; Key Discovery - Contributed to studies of the Cosmic Microwave Background
Large Binocular Telescope (LBT)
Mount Graham, Arizona, USA; Key Instruments - Dual 8.4-meter mirrors; Key Discovery - High resolution imaging and spectroscopy
Green Bank Telescope (GBT)
Green Bank, West Virginia, USA; Key Instrument - 100-meter steerable radio telescope; Key Discovery - Detailed radio maps of galaxies
Arecibo Observatory
Arecibo, Puerto Rico; Key Instruments - 305-meter diameter radio telescope; Key Discovery - Pulsars and their planets
Chandra X-ray Observatory
Orbit around Earth; Key Instruments - High-resolution mirror, CCD Imaging Spectrometer; Key Discovery - High-energy regions of the universe
TMT (Thirty Meter Telescope)
Planned for Mauna Kea, Hawaii, USA; Key Instrument - 30-meter optical telescope; Key Discovery - Will advance knowledge in areas like exoplanets and black holes (Currently under construction)
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