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GEORGE ELLERY HALE SIGNED CARD, SOLAR ASTRONOMER, SUN, OBSERVATORIES, CALTECH

$225.00

Description

HE STUDIED THE SUN, WHICH IS THE STAR AT THE CENTER OF THE SOLAR SYSTEM AND IS BY FAR THE MOST IMPORTANT SOURCE OF ENERGY FOR LIFE ON EARTH

GEORGE ELLERY HALE (1868-1938) SIGNED CARD, “George E. Hale”, on a card 4 x 2.5, by the American solar astronomer, best known for his discovery of the magnetic fields in sunspots, and as the key figure in the planning or construction of several world-leading telescopes and observatories, including Yerkes Observatory, Mount Wilson Observatory, Palomar Observatory, and the Hale Solar Laboratory. He also helped create a number of astronomical institutions, societies, and journals, and played a central role in developing the California Institute of Technology into a leading research university. As an undergraduate at MIT he is also known for inventing the spectroheliograph, with which he made his discovery of solar vortices. He was editor of the Astrophysical Journal. In 1908 he used the Zeeman effect with a modified spectroheliograph to establish that sunspots were magnetic. During WWI he played a key role in founding the National Research Council to support the government in using science for its policy aims. The card is in fine condition, with minor age toning, and the date, “1905”, in another hand on the lower left corner.

$225   #12604