A galaxy has been discovered at an early cosmic time — two billion years after the Big Bang — that has a giant disk, grown to a size more typical of the largest disks in the present Universe. The early and quick growth of this disk might be related to its special, over-dense environment.
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Fig. 1: The Big Wheel galaxy and its cosmic environment.
References
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This is a summary of: Wang, W. et al. A giant disk galaxy two billion years after the Big Bang. Nat. Astron. https://doi.org/10.1038/s41550-025-02500-2 (2025).
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A surprisingly large disk galaxy in the early Universe. Nat Astron (2025). https://doi.org/10.1038/s41550-025-02514-w
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Published:17 March 2025
DOI:https://doi.org/10.1038/s41550-025-02514-w
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