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Orbit around Earth; Features include: Captures high-resolution images of universe, not affected by Earth's atmosphere, has contributed to numerous discoveries like the rate of expansion of the universe.

Hawaii, USA; Features include: Home to many powerful telescopes due to its high altitude and clear skies, including the Keck Observatory, which boasts twin 10-metre telescopes.

California, USA; Features include: Houses the famous Hale Telescope, which was the world's largest effective telescope for many years, and is still in use today.

Cerro Paranal, Chile; Features include: Consists of four individual telescopes that can work together, located at one of the highest observatory sites on Earth.

Puerto Rico; Features include: It was home to the world's largest radio telescope until its collapse in 2020, played a key role in astronomical discoveries and the SETI program.

West Virginia, USA; Features include: The world's largest fully steerable radio telescope, part of the National Radio Astronomy Observatory (NRAO).

Planned to be Placed at Earth-Sun L2 Point; Features include: An international project, designed to study the formation of stars and galaxies, and the successor to the Hubble Space Telescope.

California, USA; Features include: The world's first permanently occupied mountain-top observatory, important for the discovery of several moons of Jupiter.

Orbit around Earth; Features include: NASA's flagship X-ray telescope, named after Nobel laureate Subrahmanyan Chandrasekhar, and excels in viewing hot regions of the universe like exploded stars.

Atacama Desert, Chile; Features include: One of the highest astronomical observatories, consists of 66 high-precision antennas, and contributes to studies on star birth during the early universe.

Antarctica; Features include: Specializes in cosmic microwave background measurements, allowing the study of cosmology, and operates in extremely cold conditions.