Early steps in the hierarchical assembly of a Milky Way-mass galaxy 1 Gyr after the Big Bangtranslating…

arXiv:2609.19687v1 Announce Type: new Abstract: We report JWST observations of a $z_{\rm spec}=5.196$ compact group of three strongly lensed low-mass galaxies ($M_\star \sim 10^{6-7} M_\odot$ each) whose small line-of-sight velocity offsets (from $-120\pm100$ to $+160\pm110$ km…