Astronomers have made a groundbreaking discovery using the James Webb Space Telescope, finding six massive galaxies that date back to within 600 million years of the Big Bang. These galaxies are more than 10 times more massive than the Milky Way, and their discovery could help scientists better understand how galaxies form and evolve. The telescope is capable of looking back to the earliest days of the universe, and has already spotted even older galaxies, dating to within a mere 300 million years of the beginning of the universe.