Risultati di ricerca
George Ellery Hale (June 29, 1868 – February 21, 1938) was an American astrophysicist, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale ...
George Ellery Hale (Chicago, 29 giugno 1868 – 21 febbraio 1938) è stato un astronomo e ottico statunitense. Nel 1889 inventò lo spettroeliografo (uno strumento per l'osservazione del Sole in luce monocromatica) e scoprì nel 1908 i campi magnetici nelle macchie solari .
Hale's most acclaimed scientific work was his demonstration that sunspots have strong magnetic fields. Hale's Polarity Law shows evidence of the existence of a well-organized large-scale magnetic field in the solar interior that cyclically changes polarity on average every 11 years.
George Ellery Hale was an American astronomer known for his development of important astronomical instruments, including the Hale Telescope, a 200-inch (508-cm) reflector at the Palomar Observatory, near San Diego. The most effective entrepreneur in 20th-century American astronomy, Hale built four.
George Ellery Hale (1868-1938) founded the Observatory in 1904 and directed it until his retirement in 1923. In the photograph above, taken around 1905, he is working in his office in the Monastery, the dormitory for astronomers on the mountain.
20 mar 2024 · George Ellery Hale at the spectrograph of the 60-foot solar tower telescope at Mount Wilson Observatory, circa 1908. Hale was determined to push beyond the descriptive astronomy of earlier generations to understand the internal physics of the Sun and the stars.
George Ellery Hale was the person most responsible for the building of Palomar Observatory. A graduate of MIT and a founder of Caltech, in 1928 he secured a grant of $6 million from the Rockefeller Foundation for the fabrication of a 200-inch reflecting telescope.
