Hooker telescope

The 2.54-metre (100-inch) reflecting telescope at the Mount Wilson Observatory, near Pasadena in California. It was completed in 1917, having been financed by a gift from John D. Hooker. Until the opening of the 5-metre (200-inch) Hale Telescope in 1948, it was the largest telescope in the world. It was temporarily closed in 1985 but was subsequently renovated and brought back into use in the early 1990s.