NASA Space Telescopes Spot an Early Universe Surprise: A Mature Galaxy Cluster FriendsofNASA.org: A new discovery captures the cosmic moment when a galaxy cluster—among the largest structures in the universe—started to assemble only about a billion years after the big bang, one or two billion years earlier than previously thought. This result, made using NASA’s Chandra X-ray Observatory and James Webb Space Telescope, will force astronomers to rethink when and how the first galaxy cluster in the

Pan of Galaxy Cluster SPT-CL J0615−5746 in Pictor | James Webb Space Telescope FriendsofNASA.org: An international team of astronomers have used the NASA/European Space Agency/Canadian Space Agency James Webb Space Telescope to discover gravitationally bound star clusters when the Universe was 460 million years old. This is the first discovery of star clusters in an infant galaxy less than 500 million years after the Big bang. Young galaxies in the early Universe underwent significant burst phas