Файл:Hubble mirror polishing.jpg

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ОписаниеHubble mirror polishing.jpg	English: 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 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.
Дата	1 март 1979
Източник	NASA Marshall Space Flight Center Collection (NIX MSFC-7995584)
Автор	NASA Marshall Space Flight Center
Права (Повторно използване на файла)	NASA

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	Дата/Час	Размер	Потребител	Коментар
текуща	22:51, 6 юни 2020	3000 × 2401 (1,29 МБ)	TD-Linux	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)
	09:21, 20 септември 2019	439 × 324 (36 КБ)	Martinlisa4828	Reverted to version as of 14:45, 6 April 2007 (UTC)
	14:44, 3 февруари 2011	3000 × 2401 (1,29 МБ)	AtomCrusher	Colour original res.
	08:12, 5 февруари 2009	256 × 194 (35 КБ)	Lycaon	was upscaled
	14:45, 6 април 2007	439 × 324 (36 КБ)	Levg	{{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= }}