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  • RESEARCH HIGHLIGHT

A galactic grouping dates to the dawn of the Universe

Telescopes detect a ‘protocluster’ that had already formed less than one billion years after the Big Bang.
Domes on the summit of Mauna Kea.

Observations by the Subaru telescope (silver and white) helped to pinpoint a primordial cluster of 12 galaxies. Credit: NAOJ

Astronomers have found the earliest known protocluster — a mass of gas that contains the seeds of a cluster of galaxies.

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Nature 574, 152 (2019)

doi: https://doi.org/10.1038/d41586-019-02919-4

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