File:A Blanket of Light (iotw2231a).tiff
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DescriptionA Blanket of Light (iotw2231a).tiff |
English: The Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory, a Program of NSF’s NOIRLab, in Chile is shown here juxtaposed against the bright Milky Way in the background. The green light above the clouds in this image is airglow, an atmospheric phenomenon caused when trace particles and gasses in the atmosphere become electrically charged or ionized. Their atoms release their own light when they recombine at night and create a faint glow. The glow is so faint that it’s rare to see airglow with the naked eye — it’s easier to capture it in long-exposure photos like this Image of the Week. Airglow is one reason why the night sky is never truly dark even in places far from light pollution. However, its presence alone generally doesn’t cause major problems when astronomers observe the sky at night. |
Date | 3 August 2022 (upload date) |
Source | A Blanket of Light |
Author | CTIO/NOIRLab/NSF/AURA/B. Tafreshi |
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Licensing[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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:01, 10 July 2023 | 4,838 × 7,018 (194.32 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/original/iotw2231a.tif via Commons:Spacemedia |
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Camera manufacturer | NIKON CORPORATION |
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F-number | f/2.8 |
ISO speed rating | 6,400 |
Date and time of data generation | 09:50, 18 July 2015 |
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Bits per component |
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Image data location | 39,806 |
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Bytes per compressed strip | 203,718,504 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 22.0 (Windows) |
File change date and time | 08:38, 24 September 2021 |
Exposure Program | Manual |
Exif version | 2.31 |
Date and time of digitizing | 09:50, 18 July 2015 |
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File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
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Digital zoom ratio | 1 |
Focal length in 35 mm film | 14 mm |
Scene capture type | Standard |
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