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Astro*Dictionary by Michael Erlewine





1 article for "Hale, George Ellery"

Hale, George Ellery [Astro*Index]

(1868-1938) American astronomer. Born at Chicago, Illinois; died in Pasadena, California.

In 1889, he invented the spectroheliograph, which allowed one to photograph the light of a single spectral line of the Sun. He used this instrument to photograph the Sun by the light of glowing calcium. In 1924, he modified the instrument to what is now known as the spectrohelioscope, and used it to photograph the sun by hydrogen light. In 1908, he detected strong magnetic fields inside sunspots. He persuaded financier Charles Yerkes to provide the funds for the Yerkes telescope at the Yerkes Observatory. He was responsible for the building of the 60-inch and 100-inch reflecting telescopes at Mount Wilson in 1908 and 1917, respectively. In 1929, obtaining a grant from the Rockefeller Foundation, he began work on the 200-inch telescope at Mount Palomar, which was not completed until 1948; this instrument was named in honor of Hale.


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