File:Counting sheep on the Chajnantor plateau (potw2328a).tiff
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Summary
[edit]DescriptionCounting sheep on the Chajnantor plateau (potw2328a).tiff |
English: This Picture of the Week shows a beautiful flock of sheep, grazing in the Chilean Andes. No, wait, wait, wait. There's no grass to feed on here, and they are at an altitude of around 5000 metres. Ok, no, they are not sheep. Let’s start again. This Picture of the Week shows the beautiful antennas of the Atacama Large Millimeter/submillimeter Array (ALMA), operated by ESO and its international partners in the Chilean Andes. Ok, that’s better!As you can see, ALMA’s 66 white antennas are not the same size: most of them are 12-metre antennas, and only twelve are 7-metre antennas (see the smaller ones over to the left of the ‘flock’?). They work together as an interferometer, acting like a single big telescope. ALMA observes the light emitted from some of the coldest objects in the Universe, such as the most distant galaxies.These antennas can be physically moved and arranged in different configurations, allowing ALMA to view the Universe with different levels of detail. The telescope can in fact probe both the broad structure of an astronomical source and its very finest details. The former requires the antennas to be close to each other, like in this image, whereas for the latter they need to be several kilometres apart. Each antenna is almost 15 metres high and weighs over 100 tons, so moving them across the desert and positioning them on concrete docking pads with millimetre precision is anything but simple — much trickier than herding sheep. To this end, two enormous transporters provided by ESO are used: yellow, 20 metres long and with 28 tyres each, they have been named Otto and Lore. |
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Date | 10 July 2023 (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 | Kommentar | |
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current | 07:15, 10 July 2023 | 3,840 × 2,160 (47.5 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.eso.org/images/original/potw2328a.tif via Commons:Spacemedia |
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Width | 3,840 px |
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Height | 2,160 px |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Image data location | 38,932 |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 2,160 |
Bytes per compressed strip | 49,766,400 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 24.4 (Macintosh) |
File change date and time | 15:06, 1 June 2023 |
Exif version | 2.31 |
Date and time of digitizing | 14:04, 1 June 2023 |
Color space | Uncalibrated |