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Dark matter and energy

Dark matter and energy

Are giant galaxy clusters defying standard cosmology?

27 Sep 2023
Image of many galaxies on a dark background. Two of the most prominent features in the image include the Thin One, located just below and left of the image center, and the Fishhook, a red swoosh at upper right.
The El Gordo galaxy cluster, as imaged in the infrared by the JWST's NIRCam. (Courtesy: NASA/ESA/CSA)
The existence of a massive galaxy cluster known as El Gordo is not compatible with standard theories

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Keith Cooper is a science writer based in the UK
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