File:Laser Guide Star in Paranal (dsc 2970-final).tiff
Original file (5,802 × 3,599 pixels, file size: 148.63 MB, MIME type: image/tiff)
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Summary[edit]
DescriptionLaser Guide Star in Paranal (dsc 2970-final).tiff |
English: The night sky is full of stars, but there are other astronomical objects visible in this picture taken at Paranal Observatory. The pinkish nebula at the very bottom on the left is the Carina nebula. Further up, there is a bluish bright star: it is Canopus, the second-brightest star in the night sky. Over to the right of Canopus, the two bluish clouds of the Large and Small Magellanic Clouds, two irregular neighbouring galaxies of the Milky Way, can be seen. To observe these and other celestial objects in greater detail, the biggest barrier for ground-based telescopes is the turbulence of Earth’s atmosphere, which makes astronomical images blurry. But the ESO’s Very Large Telescope’s (VLT) adaptive-optics system can solve this issue, and the lasers of the Laser Guide Stars Facility installed on the VLT’s Unit Telescope 4 play a key role. These lasers excite the sodium atoms in the atmosphere, which in turn emit light that is affected by the irregular air motions in the same way as the light from stars. The light is collected by the telescope and can be used by the VLT’s adaptive-optics system to measure the distortions introduced by the atmosphere and then to correct for them. |
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Date | 31 May 2023, 14:17 (upload date) | ||
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Author | ESO | ||
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Licensing[edit]
This 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 | 03:02, 1 June 2023 | 5,802 × 3,599 (148.63 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.eso.org/images/original/dsc_2970-final.tif via Commons:Spacemedia |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON Z 6_2 |
Author | LUIS CALCADA |
Exposure time | 15/1 sec (15) |
F-number | f/2.8 |
ISO speed rating | 8,000 |
Date and time of data generation | 04:59, 20 November 2022 |
Lens focal length | 14 mm |
User comments | luis.calcada@outlook.com |
Width | 5,802 px |
Height | 3,599 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 | 7 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 24.4 (Windows) |
File change date and time | 14:21, 9 May 2023 |
Exposure Program | Manual |
Exif version | 2.31 |
Date and time of digitizing | 04:59, 20 November 2022 |
APEX shutter speed | −3.906891 |
APEX aperture | 2.970854 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
Color space | sRGB |
Focal plane X resolution | 1,683.0665283203 |
Focal plane Y resolution | 1,683.0665283203 |
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 | Custom process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
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 |