See researchers’ favourites from a survey of the deep Universe by the James Webb Space Telescope.
“These galaxies are the building blocks of structure in the Universe,” says Kevin Hainline, an astronomer at the University of Arizona in Tucson. With JWST, he adds, “we’re seeing them everywhere”.Researchers think that this dog-bone-shaped object is at a redshift of 11.3, although that distance still needs to be confirmed. Assuming it is, then it appears as it was around 400 million years after the Big Bang.
JWST is finding more structure early on in the Universe than anyone had expected: the dog bone seems to be two smaller galaxies in the process of coalescing. So, by 400 million years after the Big Bang, the Universe had already formed stars that grouped into galaxies, and two of those galaxies had come together.
Before JWST began surveying the night sky, scientists had not thought that so much galactic action was possible so early in the Universe. “I did not expect to see these types of objects at all in our data,” Hainline says.
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