Mount Wilson (California) a new Mt. Wilson Hotel. In 1908 a 60-inch (1524 mm) telescope was completed at the summit, and in 1910 the Solar Tower was erected. In 1913 the hotel burned down and was replaced by a second hotel that lasted until its demolition in 1966. The Toll Road opened to automobiles in 1912 and lasted until 1936. In 1917, the 100-inch Hooker Telescope was completed and saw first light and would be the world's largest telescope until the opening of the 200-inch Hale Telescope at Palomar Observatory in 1948. In 1919, American astronomer Edwin Hubble arrived at Mt. Wilson and,
Nançay radio telescope Nançay radio telescope The Nançay decimetric radio telescope (Le radiotélescope décimétrique de Nançay (NRT)) is located in the small commune of Nançay, two hours' drive south of Paris, France. The radio telescope saw first light in 1965, after an inauguration by the then French president, Charles de Gaulle. It is one of the largest radio telescopes in the world. The NRT is a transit instrument of the unusual Kraus-type design, with two mirrors. The flat, tilting primary mirror consists of ten panels, each 20 m long and 40 m (131 ft) high; it reflects radio waves towards the fixed secondary