File:Hubble Space Telescope Primary Mirror (27712253493).jpg
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| Description |
This photograph shows the Hubble Space Telescope'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 Hubble, 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 Earth's atmosphere. The Marshall Space Flight Center had responsibility for design, development, and construction of the observatory, and the Perkin-Elmer Corporation in Danbury, Connecticut, developed the optical system and guidance sensors. Date Created: 1979-03-01 |
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| Source | Hubble Space Telescope Primary Mirror |
| Author | NASA Hubble Space Telescope |
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This image was originally posted to Flickr by NASA Hubble at https://flickr.com/photos/144614754@N02/27712253493 (archive). It was reviewed on 13 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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This file is in the public domain in the United States 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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 15:41, 13 July 2018 | | 3,000 × 2,401 (8.25 MB) | Hiàn (alt) (talk | contribs) | Transferred from Flickr via #flickr2commons |
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