For the first time, a collapsing supernova is reliably linked to high-energy neutrinos. IceCube detected four neutrino events clustered in time and space near the peak brightness of SN 2021foa, a rare Type IIn supernova. The energy of the neutrino burst exceeded the optical by two orders of magnitud
arXiv:2606.06409v1 · 2026-06-04