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

Using the James Webb Space Telescope and a galaxy cluster acting as a natural magnifying glass, astronomers discovered LAP1-B, an ancient galaxy from just 800 million years after the Big Bang. Its unusual chemistry — extremely low oxygen but elevated carbon — suggests it contains remnants from the Universe's very first stars, which died in weak supernova explosions that trapped heavy elements inside black holes while releasing carbon into surrounding gas.