New research from scientists using NASA's James Webb Space Telescope is challenging what was previously understood about how galaxies formed at the start of the universe. The international team of astronomers discovered six massive, mature "candidate galaxies" in the early universe, according to a study published in the peer-reviewed journal Nature on Wednesday. The galaxies, each of which appears to weigh billions of times more than our sun, existed about 500 to 700 million years after the Big Bang. "We just discovered the impossible. Impossibly early, impossibly massive galaxies," wrote Ivo Labbé, the study's lead author. #space #nasa #jameswebbspacetelescope