Gravity has nothing (directly) to do with acceleration of cosmic rays. You need vert strong magnetic or electric fields, preferably in shock fronts. https://en

Gravity has nothing (directly) to do with acceleration of cosmic rays. You need vert strong magnetic or electric fields, preferably in shock fronts. https://en.m.wikipedia.org/wiki/Fermi_acceleration https://en.m.wikipedia.org/wiki/Fermi_acceleration Directly, I say, because the objects that are extreme enough to produce such environments are indeed essentially fueled by gravitation energy: supermassive black holes at the centers of galaxies, super nova explosions, colliding neutron stars, ... https://www.researchgate.net/figure/A-modern-adaption-of-the-so-called-Hillas-plot-from-8-It-displays-upper-limits-on_fig1_312374947 https://www.researchgate.net/figure/A-modern-adaption-of-the...