The Italian  Nazionale Galileo Telescope (TNG) is located at the Observatory on Roque de los Muchachos, La Palma. With a primary mirror of 3.58 metres in diameter, it is the most important installation of the

The William Herschel Telescope (WHT) is the second largest telescope of Roque de Los Muchachos in La Palma. With a primary mirror of 4.2 m in diameter it is also the second largest telescope in

The Gran Telescopio de Canarias on the island of La Palma is currently the largest optical-infrared telescope in the world and one of the most advanced. The primary mirror consists of 36 hexagonal segments of