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 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