File:The Spiderweb protocluster (eso2304b).tiff

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English: This image shows the protocluster around the Spiderweb galaxy (formally known as MRC 1138-262). The light that we see in the image shows galaxies at a time when the Universe was only 3 billion years old. Most of the mass in the protocluster does not reside in the galaxies, but in the gas known as the intracluster medium. Because of the mass in the gas, the protocluster is in the process of becoming a massive cluster held together by its own gravity.
Date 29 March 2023 (upload date)
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This media was produced by the European Southern Observatory (ESO), under the identifier eso2304b

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Author ESO/H. Ford
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This media was created by the European Southern Observatory (ESO).
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current14:04, 8 April 2023Thumbnail for version as of 14:04, 8 April 20231,500 × 1,500 (2.39 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://cdn.eso.org/images/original/eso2304b.tif via Commons:Spacemedia

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