Gravitational lens shows a galaxy just 800 million years post-Big Bang

JWST, aided by gravitational lensing from a galaxy cluster, detected LAP1-B, an ultra-faint galaxy seen about 800 million years after the Big Bang.

Spectroscopy shows LAP1-B has extremely low oxygen and other heavy elements, making it the most chemically primitive galaxy observed so far.

The discovery provides a rare glimpse of an early, nearly pristine galaxy and helps scientists study how the first stars and elements formed.