Galileo Galilei is credited with inventing the first refracting telescope in 1609.

A reflecting telescope uses a curved mirror to focus light, allowing for larger apertures and longer focal lengths.

The Hubble Space Telescope was the first telescope to be launched into space in 1990.

The Gran Telescopio Canarias is the largest optical telescope in the world, with a primary mirror diameter of 10.4 meters.

The Wilkinson Microwave Anisotropy Probe (WMAP) was designed to study the cosmic microwave background radiation, providing valuable insights into the early universe.

Radio telescopes are used to detect radio waves from space, allowing astronomers to study celestial objects that emit radio radiation.

The Keck Telescopes are known for their adaptive optics system, which corrects for atmospheric distortions and allows for sharper images.

The James Webb Space Telescope's primary mirror is made of lightweight beryllium, allowing for a large aperture and precise focusing.

The Kepler Space Telescope was designed to study exoplanets and search for habitable worlds, discovering thousands of exoplanet candidates.

The Five-hundred-meter Aperture Spherical Telescope (FAST) is the largest radio telescope in the world, located in China.

The Fermi Gamma-ray Space Telescope is used to study gamma rays from space, providing insights into high-energy phenomena.

The Gran Telescopio Canarias' primary mirror is made of lightweight aluminum, allowing for a large aperture and precise focusing.

The James Webb Space Telescope is designed to study the early universe and the formation of galaxies, providing insights into the origins of the cosmos.

The Hubble Space Telescope's primary mirror is made of glass, allowing for precise focusing and high-resolution images.

The Chandra X-ray Observatory is used to study X-rays from space, providing insights into high-energy phenomena and the structure of the universe.