James Webb shocks scientists with a galaxy that shouldn’t exist – Futura-Sciences
March 19, 2026
7 min
An image extracted from a simulation showing the reionization of the observable Universe under the influence of ultraviolet radiation from galaxies, a few hundred million years after the recombination and emission of the cosmic microwave background radiation. Regions ionized by UV radiation, and which have become translucent, are shown in blue. Regions opaque to UV radiation, still containing neutral hydrogen and helium, are shown in black. The ionization front is represented in red and white. A complete video of this simulation can be found on the website of its author, Marcelo Alvarez. © M. Alvarez, R. Kaehler and T. Abel
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