Observations might have uncovered star clusters that existed when the Universe was just 460 million years old. If this timing is accurate, the discovery provides valuable clues about how and when the first stars formed. JWST images star clusters at a redshift of 10.2.
Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser . In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.Star clusters are collections of thousands to millions of stars bound together by gravity — and many can be observed in the night sky with binoculars or a small telescope.
One notable example is ω Centauri, a cluster containing millions of stars, which was first catalogued as a single star by Greek mathematician Ptolemy in150, and then later as a cluster by English astronomer Edmond Halley in 1677.
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