File:An astrophysical robbery (potw2437a).tiff
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[edit]DescriptionAn astrophysical robbery (potw2437a).tiff |
English: This Picture of the Week shows a snippet of the Hydra I cluster, which contains hundreds of galaxies. Each has its own quirks and history — but today, we focus on the story behind the leaky galaxy NGC 3312, which is the largest spiral galaxy known in the cluster.This spiral galaxy, right at the centre of this image, looks almost smudged across the screen, spilling its contents into the cosmos around it. This is NGC 3312, falling victim to an astrophysical robbery: ram pressure stripping.This happens when a galaxy moves through a dense fluid, like the hot gas suspended between galaxies in a cluster. This hot gas drags against the colder gas on the outer shell of the galaxy, ‘pulling’ it off of the galaxy and causing it to leak into the cosmos. This cold gas is the raw material out of which stars form, meaning galaxies losing gas this way risk a dwindling stellar population. Affected galaxies — usually those falling into the centre of clusters — tend to eventually form long tendrils of gas trailing behind them, leading to their nickname: jellyfish galaxies.This is just one of the many astronomical processes that make pictures of the Universe so varied and captivating. What other stories are waiting to be told about the hundreds of blips in this image? |
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Date | 9 September 2024 (upload date) | ||
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Author | ESO/INAF/M. Spavone, E. Iodice | ||
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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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current | 07:15, 10 September 2024 | 3,793 × 3,002 (13.46 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.eso.org/images/original/potw2437a.tif via Commons:Spacemedia |
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Width | 3,793 px |
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Height | 3,002 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 1 |
Horizontal resolution | 25.4 dpi |
Vertical resolution | 25.4 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 25.9 (Windows) |
File change date and time | 08:43, 3 September 2024 |
Color space | sRGB |