File:VLT main mirror cleaning and recoating.webm
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editDescriptionVLT main mirror cleaning and recoating.webm |
English: Every night the huge mirrors of the Very Large Telescope are exposed to the atmosphere whilst uncovered during observing sessions. They gradually accumulate dust and other pollutants that reduce their reflectivity, making them less effective at capturing faint light from the cosmos. So they are regularly removed from the telescope, taken down the mountain to the recoating facility, cleaned and finally recoated with a thin and highly reflective new aluminium layer. |
Date | |
Source | ESO |
Author | ESO/G. Hüdepohl |
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editThis media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:28, 11 August 2017 | 13 min 7 s, 1,920 × 1,080 (475.24 MB) | Originalwana (talk | contribs) | Videoconvert upload from toollabs |
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