JWST Sees a Galaxy Cluster Coming Together in the Early Universe By Nancy_A
So, extreme distances in the early universe are referenced by how much the light emitted from an object has been shifted as it travelled through space. These galaxies were measured to have a redshift 7.9, which correlates to 650 million years after the Universe began.
So far, one of the earliest galaxies JWST has seen, one named JADES-GS-z13-0, is estimated to be imaged at 325 million years after the Big Bang.
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