A surprisingly large disk galaxy in the early universe – about two billion years after the Big Bang – with dimensions more typical of the giant galactic disks of the current universe. This is the discovery of the “Cosmic Web” research group, part of the Astrophysics Unit of the Physics Department at the University of Milano-Bicocca, reported in an article published today in “Nature Astronomy” (“A giant disk galaxy two billion years after the Big Bang”, DOI: 10.1038/s41550-025-02500-2), signed by Weichen Wang and Sebastiano Cantalupo, respectively research fellow (post-doc) and full professor at the university, in addition to the other members of the “Cosmic Web” group and international collaborators. The discovery is based on the data obtained by the researchers of Milano-Bicocca from the James Webb Space Telescope (JWST), the largest and most powerful space observatory ever built to date, the result of a partnership between NASA, ESA and the Canadian Space Agency.