File:Telescopes Standing Sentry (iotw2139a).tiff
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[edit]DescriptionTelescopes Standing Sentry (iotw2139a).tiff |
English: Three telescopes stand sentry under an unusual skyscape in this image from Cerro Tololo Inter-American Observatory (CTIO), a Program of NSF’s NOIRLab. The prominent bright ring which hangs ominously above the telescopes is an optical phenomenon known as a 22° halo, and is created by the interplay of ice crystals and light in Earth’s atmosphere. When sunlight or moonlight encounters icy high-altitude clouds such as the wispy cirrus clouds in this image, countless ice crystals refract and redirect the rays of light and cause a halo to form. The angle of refraction depends on the wavelength of light, which causes the inner edge of the halo to be slightly reddened.The central telescope in this image is the Curtis Schmidt Telescope, which is flanked by the SMARTS 0.9-meter and 1.0-meter telescopes. These three telescopes are part of a complex of around 40 telescopes at CTIO, which together provide US and worldwide astronomers with access to astronomical research in the southern hemisphere. |
Date | 29 September 2021 (upload date) |
Source | Telescopes Standing Sentry |
Author | CTIO/NOIRLab/NSF/AURA/B. Tafreshi |
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[edit]This media was created by the National Optical-Infrared Astronomy Research Laboratory (NOIRLab).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public NOIRLab website, along with the texts of press releases, announcements, images of the week 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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File change date and time | 00:17, 23 June 2021 |
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