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The 60-inch (1.5 m) telescope at Mt. Wilson. For the 60-inch telescope, George Ellery Hale received the 60-inch (1.5 m) mirror blank, cast by Saint-Gobain in France, in 1896 as a gift from his father, William Hale. It was a glass disk 19 cm thick and weighing 860 kg.
While the glass was being poured into the mold during the first attempt to cast the 200-inch mirror, the intense heat caused several of the molding blocks to break loose and float to the top, ruining the mirror. The defective mirror was used to test the annealing process. After the mold was re-engineered, a second mirror was successfully cast.
The 60-inch Hale telescope (1.5 m), Hooker Telescope, 200-inch Hale Telescope, Shane Telescope, and Harlan J. Smith Telescope all were built with coudé foci instrumentation. The development of echelle spectrometers allowed high-resolution spectroscopy with a much more compact instrument, one which can sometimes be successfully mounted on the ...
The first mirror had a focal length of 60 ft (18 m), which produced an image of the Sun with a diameter of about 6.7 in (17.0 cm). The second had a longer focal length of 143 ft (44 m), yielding an image 16 in (40.6 cm) across. A wheeled housing is used to protect the mirrors when they are not in use. [1] [11]
Maiden Home’s collection mirrors these themes beautifully with pieces that are just as livable as they are luxurious. ... “The 60-inch round in pecan is an absolute stunner for our breakfast ...
He played a major role in designing the mountings and making the mirrors of the Mt. Wilson 60-inch (1.5 m) and 100-inch (2.5 m) telescopes. Hale and Ritchey had a falling-out in 1919, and Ritchey eventually went to Paris where he promoted the construction of very large telescopes.
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