Astronomers Refine Measurements of Universe's First Five Minutes Using Pristine Ancient Galaxies
Researchers have made a significant advancement in our understanding of the Universe's earliest moments. Using one of the world's most powerful telescopes, the team examined 15 remarkably pristine galaxies that have preserved chemical signatures from nearly 13.8 billion years ago. These ancient galaxies served as natural time capsules, allowing scientists to measure with unprecedented precision the amount of helium produced during the first five minutes following the Big Bang. The findings help refine cosmological models and deepen our understanding of the fundamental processes that shaped the early Universe.