File:NASA's Webb Draws Back Curtain on Universe's Early Galaxies (Stacked graphic, used on Facebook) (52505830106).png
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[edit]DescriptionNASA's Webb Draws Back Curtain on Universe's Early Galaxies (Stacked graphic, used on Facebook) (52505830106).png |
A long time ago… in galaxies far far away, the first stars were born in the early universe. But when and how? That’s a mystery Webb is one step closer to solving. Using Webb, researchers have found two early galaxies that are unusually bright, one of which could contain the most distant starlight ever seen. The galaxies are thought to have existed 350 and 450 million years after the big bang (respectively, from top to bottom). Unlike our Milky Way, these first galaxies are small and compact, with spherical or disk shapes rather than grand spirals. Webb’s new findings suggest that the galaxies would have had to begin coming together about 100 million years after the big bang — meaning that the first stars might have started forming in such galaxies around that time, much earlier than expected. Follow-up observations with Webb’s spectrographs will confirm the distances of these primordial galaxies and help us learn more about the earliest stars. More: www.nasa.gov/feature/goddard/2022/nasa-s-webb-draws-back-... Credit: NASA, ESA, CSA, Tommaso Treu (UCLA) [Image description: Two vertically stacked views of galaxy cluster Abell 2744 as seen by the Webb telescope. Both views feature countless galaxies of all shapes and sizes speckling the black backdrop of space. Some are spiral, some more disk-shaped and others spherical. Farther galaxies are only seen as dots. Their colors include blue, pink, orange, and white. The view at the bottom is differentiated by bright white stars with long diffraction spikes, unseen in the view at the top. Towards the left of both views, there is a small white box highlighting a notable galaxy. These two tiny boxes have diagonal lines connecting them to close-ups of their contents, placed in much larger inset boxes on the right. The close-up box on the top, labeled as 1, shows a red dot along with some surrounding streaks of foreground galaxies. This red dot is a never-before-seen galaxy thought to have existed 350 million years after the big bang. The close-up box on the bottom, labeled as 2, shows a central red disk with a few other blurry and fuzzy foreground galaxies. This disk is another never-before-seen galaxy, this one thought to have existed 450 million years after the big bang.] |
Date | |
Source | NASA's Webb Draws Back Curtain on Universe's Early Galaxies (Stacked graphic, used on Facebook) |
Author | NASA's James Webb Space Telescope from Greenbelt, MD, USA |
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This image was originally posted to Flickr by James Webb Space Telescope at https://flickr.com/photos/50785054@N03/52505830106. It was reviewed on 6 June 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 June 2023
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Vertical resolution | 37.8 dpc |