تعريف mount wilson observatory في الإنجليزية الإنجليزية القاموس.
Astronomical observatory located atop Mount Wilson, near Pasadena, California, U.S. Founded in 1904 by George Ellery Hale (1868-1938), it was operated jointly with Palomar Observatory as Hale Observatories (1948-80). Its largest optical telescope, with a diameter of 100 in. (2.5 m), enabled Edwin Hubble and his associates to discover evidence of an expanding universe and to estimate its size