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File:Hubble mirror polishing.jpg

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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 Center 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.
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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
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Reverted to version as of 14:44, 3 February 2011 (UTC) (previous revert seemed to be a mistake - this version matches https://www.nasa.gov/sites/default/files/thumbnails/image/1979_hst_primary_mirror.jpg)
375: 744:{{Information |Description= Polishing of Hubble's primary mirror begins. |Source= http://history.msfc.nasa.gov/book/chpttwelve.pdf |Date= May 1979 |Author= |Permission= |other_versions= }} 816: 1006: 452: 436: 440: 432: 528: 448: 444: 986: 647: 617: 806: 455:"}},"text\/plain":{"en":{"P459":"work of the federal government of the United States"}}}}": --> 354:
joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use.
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The following pages on the English Knowledge use this file (pages on other projects are not listed):
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data may be copyrighted if they are not explicitly produced by the
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NASA Marshall Space Flight Center Collection (NIX MSFC-7995584)
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Draft:Keynote lectures/Satellites for radiation astronomy
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Reverted to version as of 14:45, 6 April 2007 (UTC)
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