James Webb telescope reveals 4 of the universe's earliest galaxies.

The James Webb Space Telescope has discovered the four most distant galaxies ever seen, located a little over 13 billion light-years from Earth. These galaxies were born just 300 to 500 million years after the Big Bang, in the infancy of our now almost 14 billion-year-old universe. The galaxies exist in the epoch of reionization, a time when astronomers think the first stars were being created. The researchers used detailed measurements of the galaxies' spectra to double-check the accuracy of the redshifts. The galaxies were creating stars at a fast pace, and they don't appear to contain any particularly complex elements, suggesting that their stars haven't yet had time to create heavier elements.