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The Astroscan had a Newtonian reflector layout with a 4â…›" clear-inch (105mm) diameter f/4.2 aluminized and overcoated borosilicate glass parabolic primary mirror with a focal length of 17½ inches (445mm). [1]
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.
Astro-Physics, Inc. is a manufacturer of amateur telescopes, mounts, and accessories. Founded in 1975 by former Sundstrand Corporation engineer Roland Christen, [ 1 ] the company is noted for its line of apochromatic refractors as well as high-end mounts.
Optical telescopes can be classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they are constructed, or by the task they perform. They all have their different advantages and disadvantages and they are used in different areas of professional and amateur astronomy .
Astrotech Corporation, formerly Spacehab Inc., [3] is a technology incubator headquartered in Austin, Texas.Astrotech uses technology sourced internally and from research institutions, government laboratories, and universities to fund, manage and sell start-up companies.
JP11 – a 1978 catalog compiling photometric measurements in Harold Johnson's 11-color photometric system ; Jsp — Morris Ketchum Jessup (double stars) Juchert — (open star clusters) Juchert-Saloranta (telescopic asterisms) JW — Jones' & Walker's list of stars near the Orion Nebula.
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