The detection of a ring galaxy at a redshift of z = 2.2, potentially a product of a past collision with a companion galaxy, provides new insights on ring formation and the evolution of disk galaxies in the early Universe.
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Buta, R.J. A ring in the distant Universe. Nat Astron 4, 925–926 (2020). https://doi.org/10.1038/s41550-020-1119-y
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DOI: https://doi.org/10.1038/s41550-020-1119-y