詹姆斯·韦伯太空望远镜的最新观测揭示，宇宙早期的大质量星系含有远比科学家之前认为的更多小型、暗淡恒星，这使得这些古老星系的质量估计可能比原先预测高三到四倍。1研究团队观察了九个大质量、成熟的古老星系，其中一个星系可能形成于大爆炸后不到15亿年。1
这一发现对现有理论构成了重大挑战。隐藏在这些古老星系中的庞大恒星群体加剧了解释早期星系为何能够如此迅速形成的困难。1研究同时挑战了长期以来关于恒星在宇宙中按照均匀比例形成的假设。1此外，研究表明早期宇宙中可能存在比之前认为的更多绕低质量恒星运行的行星。1相关研究已发表在《自然天文学》期刊上。1
An international research team, including scientists from Pennsylvania State University, has used the James Webb Space Telescope to uncover a significant gap in our understanding of the early universe.1 The researchers observed nine massive, mature galaxies in the ancient cosmos and discovered that these galaxies contain far more small, faint stars than astronomers had anticipated.1 This hidden population of stars means these early galaxies could be three to four times more massive than previous estimates suggested.1
The findings present a substantial challenge to long-standing assumptions about how stars form uniformly throughout the universe.1 One of the observed galaxies may have formed fewer than 1.5 billion years after the Big Bang, yet it already possessed a mass far exceeding what current models would predict for such an early epoch.1 The discovery intensifies existing theoretical puzzles about how such massive galaxies could assemble so rapidly in the early universe.
Beyond implications for galactic formation, the research suggests the early cosmos may harbor significantly more planets orbiting low-mass stars than previously believed.1 The study has been published in the journal Nature Astronomy.1
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