File:Ribbons of Light (iotw2147a).tiff
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Size of this JPG preview of this TIF file: 800 × 534 pixels. Other resolutions: 320 × 214 pixels | 640 × 427 pixels | 1,024 × 683 pixels | 1,280 × 854 pixels | 2,560 × 1,709 pixels | 4,928 × 3,289 pixels.
Original file (4,928 × 3,289 pixels, file size: 38.25 MB, MIME type: image/tiff)
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[edit]DescriptionRibbons of Light (iotw2147a).tiff |
English: For a photo taken at night, this image appears to be ablaze with light. The winding road, which leads to Gemini North, one half of the international Gemini Observatory, a Program of NSF’s NOIRLab, looks like a bright white ribbon. However, this abundance of artificial light is an illusion. In reality, enormous effort is made to keep artificial light in the area around the telescopes to a bare minimum. This mitigates interference by light sources from Earth with astronomical observations.The road appears so bright because the photo was taken with a long exposure time. This is evident by the long trails swept out by the stars, caused by the rotation of the Earth. This is also discernible by the orange band on the left, caused by the movement of a laser guide star (LGS) coming from a telescope at the summit of Maunakea. These LGS systems track how atmospheric turbulence distorts light as it reaches the Earth so that these changes can be accounted for in telescope observations. As the long exposure captured the apparent movement of the stars and laser guide star, the light from the road accumulated, resulting in a seemingly glowing road! |
Date | Taken in 2021 |
Source | Ribbons of Light |
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 | 15:52, 20 August 2023 | 4,928 × 3,289 (38.25 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/original/iotw2147a.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.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D800 |
Author | Jason K. Chu |
Exposure time | 30/1 sec (30) |
F-number | f/2.8 |
ISO speed rating | 8,063 |
Date and time of data generation | 15:14, 1 July 2020 |
Lens focal length | 14 mm |
Width | 4,928 px |
Height | 3,289 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 | 17 |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 22.0 (Windows) |
File change date and time | 11:08, 29 January 2021 |
Exposure Program | Manual |
Exif version | 2.3 |
Date and time of digitizing | 15:14, 1 July 2020 |
APEX shutter speed | −4.906891 |
APEX aperture | 2.970854 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Fine weather |
Flash | Flash did not fire, compulsory flash suppression |
Color space | Uncalibrated |
Focal plane X resolution | 2,048.4022216797 |
Focal plane Y resolution | 2,048.4022216797 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 14 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |