Astronomers using the James Webb Space Telescope have found that the most distant galaxies are being “watered down” with pristine gas from their surroundings far more than nearby ones
without metals in it. They’re most likely born as we’d expect, with relatively low metal abundances but not abnormally low, and then they gobble up gas from the surrounding intergalactic material.
This means that these galaxies are not as independent of their surroundings as the ones we see in the nearby universe. “If we are to understand galaxy evolution at the earliest epochs, we can no longer treat them as individual ‘ecosystems’,” says Heintz. “We have to take into account their intimate connection to the surrounding intergalactic or cirgumgalactic gas.”Voyage across the galaxy and beyond with our space newsletter every month.
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