Primary computation (not merely a review of others’ safety work) of how the cosmic-ray flux at RHIC-equivalent and higher energies, integrated over the lifetime of the Earth, Sun, white dwarfs and neutron stars, bounds the rate of any hypothetical dangerous new-physics event; predates and methodologically anchors the later LHC-era LSAG/Giddings-Mangano safety arguments. relevance_note: earliest primary “cosmic rays as natural collider experiment” flux-to-event-rate calculation, the template the later LHC safety reports (out of this slice’s scope) reuse and extend.