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GEORGE ELLERY HALE
GEORGE ELLERY HALE
USA (1868 - 1938)
George Ellery Hale was an American solar astronomer, born in Chicago. He was educated at MIT, at the Observatory of Harvard College, (1889-90), and at Berlin (1893-94). As an undergraduate at MIT, he invented the spectroheliograph, with which he made his discoveries of the solar vortices and magnetic fields of sun spots.
 

Enjoy these insightful and educational video clips drawn from over 70 hours of interviews with the world's leading figures in astronomy, shot during the filming of 400 Years of the Telescope.

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Trudy Bell

Franhoffer and the refracting telescope
Trudy Bell - Writer

Franhoffer was very interested in optics from a very young age, apprenticed to a spectacle-maker, and then went on because he wanted to make the largest telescopes in the world, and the best telescopes in the world, and he did.

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Trudy Bell

Early single lens telescopes and the achromatic problem
Trudy Bell - Writer

The main problem with using a single lens as Hoegens and Galileo and the early people was that it acted like a prism, so you ended up getting fringes of color around any object that you were looking at at a distance, particularly bright objects like stars.

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Trudy Bell

Why I became interested in astronomy
Trudy Bell - Writer

I just became so fascinated with these megapieces of engineering, and all the people who had their hearts broken by them and had their reputations made by them, it’s so much a human story, as much as anything else, and they’re so beautiful, these instruments are just works of art.

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Trudy Bell

William Herschel's large reflector telescopes
Trudy Bell - Writer

in the late 18th century you had William Herschel in England with his 20-foot telescope, and 40-foot telescope with a Herschelian focus.

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Butler Burton

Electromagnetic spectrum
Butler Burton - NRAO, Green Bank

The electromagnetic spectrum includes the very short wavelengths, very high energetic waves. Gamma rays, x-rays, ultraviolet waves. Visible waves, the only ones we can see with our eyes. Infrared. Then the radio are the very long waves, stretching from a few millimeters out to many, many meters.

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