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Celestron was the first large scale commercial manufacturer of the Schmidt-Cassegrain telescope, introducing its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope in 1970. [7] The primary innovation Celestron/Tom Johnson devised was a method to produce Schmidt corrector plates using a vacuum to pull the glass blanks into a pre-shaped curve ...
The first large telescope to use the design was the James Gregory Telescope of 1962 at the University of St Andrews. As of 2021, the James Gregory Telescope is also recognized as the largest Schmidt-Cassegrain. [4] The telescope is noted for its large field of view, up 60 times a full moon. [4]
The 14th magnitude central star has passed the turning point in its evolution and is condensing to form a white dwarf. [ 7 ] [ 8 ] It has 55–60% of solar mass, is 41 to 148 times solar luminosity ( L ☉ ), [ 5 ] and has an effective temperature of 123,000 K. [ 9 ] The star has been successfully resolved by the Spitzer Space Telescope as a ...
By the summer of 2011, sufficient telescopes were operational during the extensive program of testing prior to the Early Science phase for the first images to be captured. [26] These early images gave a first glimpse of the potential of the new array that will produce much better quality images in the future as the scale of the array continues ...
Orion Telescopes & Binoculars was an American retail company that sold telescopes, binoculars and accessories online and in-store for astronomy and birdwatching. It was founded in 1975 and had corporate offices in Watsonville, California. [1] A large proportion of its products were manufactured by the Chinese company Synta for the Orion brand ...