The shift from astronomy to astrophysics necessitated the development of new tools of observation at the end of the 19th and beginning of the 20th century. In this episode, we look at the rise of the reflecting telescopes and the men who use them including, James Keeler and George Ritchey, probably the greatest telescope designer in history.
Four Common Reflecting Telescope Designs
James E. Keeler
The Crossley Reflector-Lick Observatory
George Ritchey
60" Reflector at Mt. Wilson
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