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File:Hubble mirror polishing.jpg


Description Hubble Space Telescope Primary Mirror: This photograph shows the Hubble Space Telescope's (HST's) Primary Mirror being ground at the Perkin-Elmer Corporation's large optics fabrication facility. After the 8-foot diameter mirror was ground to shape and polished, the glass surface was coated with a reflective layer of aluminum and a protective layer of magnesium fluoride, 0.1- and 0.025-micrometers thick, respectively. The purpose of the HST, the most complex and sensitive optical telescope ever made, is to study the cosmos from a low-Earth orbit. By placing the telescope in space, astronomers are able to collect data that is free of the Earth's atmosphere. The Marshall Space Flight Centre had responsibility for design, development, and construction of the HST and the Perkin-Elmer Corporation, in Danbury, Connecticut, developed the optical system and guidance sensors.
Date 1 March 1979
Source NASA Marshall Space Flight Centre Collection (NIX MSFC-7995584)
Author NASA Marshall Space Flight Centre
( Reusing this file)



Public domain This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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