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The 26 m (85 ft) Peach Mountain Radio Telescope is parabolic reflector built in 1958 with funds provided by the United States Navy Office of Naval Research. Since the mid-1960s it has focused on the monitoring the flux density and linear polarization of radio emissions from active extragalactic objects. [1] Use of the telescope ceased after ...
The ETX started out as a 90 mm (3-1/2") Maksutov Cassegrain telescope (first produced in 1996) and took advantage of high volume mass production and simplified optical and parts construction to open a new market for a cheap alternative to the very expensive Questar 3-1/2 Maksutov Cassegrain [1] [2] The ETX "line" has been expanded to 105 mm, and 125 mm Maksutov Cassegrains and achromatic ...
McMath–Pierce solar telescope is a 1.6 m f/54 reflecting solar telescope at Kitt Peak National Observatory in Arizona, United States. Built in 1962, the building was designed by American architect Myron Goldsmith and Bangladeshi-American [ 1 ] structural engineer Fazlur Rahman Khan . [ 2 ]
The Polaris 4K gets the important stuff right: image quality, sound quality, noise level and so on. And at this price, it's at least $1,000 less than most USTs. What do you think?
The James Webb Space Telescope is a three-mirror anastigmat featuring an ellipsoidal primary, hyperboloidal secondary, and ellipsoidal tertiary. [8] The Euclid mission uses a Korsch telescope. The "Cambridge University Three-Mirror Telescope". project includes a 100 mm working model built in 1985 and a 500 mm prototype built in 1986.
The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.