The James Webb Space Telescope (JWST) has spotted a strange “inside-out” galaxy at the beginning of the universe.
The galaxy, named JADES-GS+53.18343−27.79097, existed just 700 million years after the Big Bang and is roughly 100 times smaller than the Milky Way. Yet, unlike most galaxies, its growth seems to have occurred inside-out — with stars forming more rapidly on the outskirts than inside its dense core.
Theoretical models have predicted that such inside-out galaxies should be common across the early universe, but scientists previously lacked the ability to peer through the dust and gas that obscured them from view. Now, thanks to JWST, the researchers have confirmed their predictions by glimpsing the earliest one ever seen. They published their findings Oct. 11 in the journal Nature Astronomy.