Le télescope Webb détecte une galaxie sans rotation dans l'univers primitif

Des astronomes utilisant le télescope spatial James Webb ont identifié une galaxie massive ne présentant aucune rotation, formée moins de 2 milliards d'années après le Big Bang. Cette découverte remet en question les modèles actuels d'évolution des galaxies.

La galaxie, connue sous le nom de XMM-VID1-2075, contient plusieurs fois plus d'étoiles que la Voie lactée et a déjà cessé d'en former de nouvelles. Le chercheur principal Ben Forrest, de l'université de Californie à Davis, a décrit l'absence de rotation comme surprenante et inattendue pour un objet aussi ancien.

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