부산대학교 도서관

While most galaxies in the early universe are young and still actively forming, JWST revealed that at least some of them already have very old clusters of stars that formed just a billion years after the Big Bang. Rather than finding all early galaxies are patchy and unsettled, JWST has shown that some galaxies may have formed disks 13 billion years ago, much earlier than anticipated. The early universe is small and densely packed with gas ready to compress and form stars, yet JWST is revealing that some galaxies are taking a peaceful break from star formation as early as 700 million years after the Big Bang. FEATURES What were astronomers expecting to see when we used the James Webb Space Telescope (JWST) to look at the universe's first few billion years?. [Extracted from the article]