File:A Spiral Amongst Thousands (potm2301a).jpeg
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Summary
DescriptionA Spiral Amongst Thousands (potm2301a).jpeg |
English: A crowded field of galaxies throngs this Picture of the Month from the NASA/ESA/CSA James Webb Space Telescope, along with bright stars crowned with Webb’s signature six-pointed diffraction spikes. The large spiral galaxy at the base of this image is accompanied by a profusion of smaller, more distant galaxies which range from fully-fledged spirals to mere bright smudges. Named LEDA 2046648, it is situated a little over a billion light-years from Earth, in the constellation Hercules.One of Webb’s principle science goals is to observe distant — and hence ancient — galaxies to understand the details of their formation, evolution, and composition. Webb’s keen infrared vision helps the telescope peer back in time, as the light from older, more distant galaxies is redshifted towards infrared wavelengths. Comparing these galactic fossils to modern galaxies will help astronomers understand how galaxies grew to form the structures we see in the universe today. Webb will also probe the chemical composition of thousands of galaxies to shed light on how heavy elements were formed and built up as galaxies evolved. To take full advantage of Webb’s potential for galaxy archeology, astronomers and engineers must first calibrate the telescope’s instruments and systems. Each of Webb’s instruments contains a labyrinthine array of mirrors and other optical elements that redirect and focus starlight gathered by Webb’s main mirror. This particular observation was part of the commissioning campaign for Webb’s Near-InfraRed Imager and Slitless Spectrograph (NIRISS). As well as performing science in its own right, NIRISS supports parallel observations with Webb’s Near-InfraRed Camera (NIRCam). NIRCam captured this galaxy-studded image while NIRISS was observing the white dwarf WD1657+343, a well-studied star. This allows astronomers to interpret and compare data from the two different instruments, and to characterise the performance of NIRISS.[Image description: Many stars and galaxies lie on a dark background, in a variety of colours but mostly shades of orange. Some galaxies are large enough to make out spiral arms. Along the bottom of the frame is a large, detailed spiral galaxy seen at an oblique angle, with another galaxy about one-quarter the size just beneath it. Both have a brightly glowing core, and areas of star formation which light up their spiral arms.] |
Date | 31 January 2023 (upload date) |
Source | A Spiral Amongst Thousands |
Author | ESA/Webb, NASA & CSA, A. Martel |
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This file is licensed under the Creative Commons Attribution 4.0 International license.
Attribution: ESA/Webb, NASA & CSA, A. Martel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:27, 31 January 2023 | 4,218 × 2,843 (2.12 MB) | OptimusPrimeBot | #Spacemedia - Upload of https://cdn.esawebb.org/archives/images/large/potm2301a.jpg via Commons:Spacemedia |
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Source | ESA/Webb |
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Credit/Provider | ESA/Webb, NASA & CSA, A. Martel |
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Date and time of data generation | 06:00, 31 January 2023 |
Software used | Adobe Photoshop 23.5 (Windows) |
File change date and time | 23:44, 24 January 2023 |
Date and time of digitizing | 12:37, 13 January 2023 |
Date metadata was last modified | 00:44, 25 January 2023 |
Unique ID of original document | xmp.did:7f39be90-406a-aa4d-b28e-22bea27e0c38 |
Keywords | LEDA 2046648 |
Contact information |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
IIM version | 4 |