Looking inside the plasma jet cone of the blazar PKS 1424+240 with a radio telescope of the Very Long Baseline Array (VLBA). Credit: NSF/AUI/NRAO/B. Saxton/Y.Y. Kovalev et al. ==================================================================================== A cosmic jet aimed at Earth reveals how blazars hurl particles to extreme energies, solving a long-standing mystery. Key Points * A glimpse into a galaxy’s core: Astronomers have captured a detailed image of the birthplace of a powerful cosmic jet. With its artificial colors, the view strikingly resembles the legendary “Eye of Sauron.” * The neutrino puzzle: PKS 1424+240 stands out as the brightest known source of neutrinos of its...