International Gemini Observatory/NOIRLab/NSF/AURA/M. Zamani; NASA/ESA
Gemini North and Hubble image of GRB afterglow (unannotated)
This Gemini North image, superimposed on an image taken with the Hubble Space Telescope, shows the telltale near-infrared afterglow of a kilonova produced by a long GRB (GRB 211211A). This discovery challenges the prevailing theory that long GRBs exclusively come from supernovae, the end-of-life explosions of massive stars.
