File:Hanging by a Thread (iotw2120a).tiff
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[edit]DescriptionHanging by a Thread (iotw2120a).tiff |
English: In this image, one of the Maunakea observatories appears to be hanging by a golden thread. In reality, the thread is a beam of light, and it is not descending from the sky, but is pointing upwards from the telescope itself. It originates from Gemini North, part of the international Gemini Observatory, a Program of NSF’s NOIRLab. The light beam is a laser guide star , and its purpose is to form an artificial constellation of stars in the atmosphere, 90 kilometers (56 miles) from the Earth’s surface.Intuitively it seems that the laser beam must be extraordinarily powerful. Remarkably, however, the laser guide star produces about as much energy as a bedside lamp. The reason why light with so little energy can beam so far into the atmosphere is because laser beams are incredibly focused, with all the energy concentrated in a single direction. The laser beam is actually not very visible to human eyes from a distance and is captured here through clever photography techniques. However, it would be very dangerous to look directly into it! |
Date | 19 May 2021 (upload date) |
Source | Hanging by a Thread |
Author | International Gemini Observatory/NOIRLab/NSF/AURA/ J. Chu |
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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 | 20:52, 12 July 2023 | 5,906 × 3,745 (45.75 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/original/iotw2120a.tif via Commons:Spacemedia |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Author | Jason K. Chu |
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Copyright holder | Jason K. Chu: jasonchuphotography@gmail.com |
Date and time of data generation | 15:14, 1 July 2020 |
Width | 5,906 px |
Height | 3,745 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 14 |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 21.1 (Windows) |
File change date and time | 01:30, 18 January 2021 |
Exif version | 2.3 |
Date and time of digitizing | 15:14, 1 July 2020 |
Color space | Uncalibrated |