File:Euclid’s view of irregular galaxy NGC 6822 ESA25170768.jpg
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[edit]DescriptionEuclid’s view of irregular galaxy NGC 6822 ESA25170768.jpg |
English: To create a 3D map of the Universe, Euclid will observe the light from galaxies out to 10 billion light-years. Most galaxies in the early Universe don’t look like the quintessential neat spiral, but are irregular and small. They are the building blocks for bigger galaxies like our own, and we can still find some of these galaxies relatively close to us. This first irregular dwarf galaxy that Euclid observed is called NGC 6822 and is located close by, just 1.6 million light-years from Earth. Read more about Euclid’s view of irregular galaxy NGC 6822 Explore this image at the highest resolution in ESASky Read more about Euclid's first images [Technical details: The data in this image were taken in just five hours of observation. This colour image was obtained by combining VIS data and NISP photometry in Y and H bands; its size is 8800 x 8800 pixels. VIS and NISP enable observing astronomical sources in four different wavelength ranges. Aesthetics choices led to the selection of three out of these four bands to be cast onto the traditional Red-Green-Blue colour channels used to represent images on our digital screens (RGB). The blue, green, red channels capture the Universe seen by Euclid around the wavelength 0.7, 1.1, and 1.7 micron respectively. This gives Euclid a distinctive colour palette: hot stars have a white-blue hue, excited hydrogen gas appears in the blue channel, and regions rich in dust and molecular gas have a clear red hue. Distant redshifted background galaxies appear very red. In the image, the stars have six prominent spikes due to how light interacts with the optical system of the telescope in the process of diffraction. Another signature of Euclid special optics is the presence of a few, very faint and small round regions of a fuzzy blue colour. These are normal artefacts of complex optical systems, so-called ‘optical ghost’; easily identifiable during data analysis, they do not cause any problem for the science goals.] [Image description: This square astronomical image is speckled with numerous stars visible across the black expanse of space. Most stars are visible only as pinpoints. More stars are crowding the centre of the image, visible as an irregular round shape. This is an irregular galaxy. The centre of the galaxy appears whiter and the edges yellower. Several pink bubbles are visible spread throughout the galaxy, these are star forming regions. The stars across the entire image range in colour from blue to white to yellow/red, across a black background of space. Blue stars are younger and red stars are older. A few of the stars are a bit larger than the rest, with six diffraction spikes.] |
Date | 7 November 2023 (upload date) |
Source | Euclid’s view of irregular galaxy NGC 6822 |
Author | ESA/Euclid/Euclid Consortium/NASA image processing by J.-C. Cuillandre (CEA Paris-Saclay) G. Anselmi |
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Activity InfoField | Space Science |
Keyword InfoField | Galaxies |
Mission InfoField | Euclid |
Set InfoField | Euclid First Images |
Licensing
[edit]This media was created by the European Space Agency (ESA).
Where expressly so stated, images or videos are covered by the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence, ESA being an Intergovernmental Organisation (IGO), as defined by the CC BY-SA 3.0 IGO licence. The user is allowed under the terms and conditions of the CC BY-SA 3.0 IGO license to Reproduce, Distribute and Publicly Perform the ESA images and videos released under CC BY-SA 3.0 IGO licence and the Adaptations thereof, without further explicit permission being necessary, for as long as the user complies with the conditions and restrictions set forth in the CC BY-SA 3.0 IGO licence, these including that:
See the ESA Creative Commons copyright notice for complete information, and this article for additional details.
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This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license. Attribution: ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi, CC BY-SA IGO 3.0
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current | 18:54, 7 November 2023 | 8,200 × 8,200 (5.34 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2023/11/euclid_s_view_of_irregular_galaxy_ngc_6822/25170757-1-eng-GB/Euclid_s_view_of_irregular_galaxy_NGC_6822.jpg via Commons:Spacemedia |
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Date and time of data generation | 00:00, 31 October 2023 |
Pixel composition | RGB |
Orientation | Normal |
Horizontal resolution | 1 dpi |
Vertical resolution | 1 dpi |
Software used | GIMP 2.10.18 |
File change date and time | 22:09, 31 October 2023 |
Unique ID of original document | xmp.did:927a473a-2615-44e4-8cba-90f811d516c9 |
IIM version | 2 |