The Cloud Chamber allows us to differentiate the traces of different radionuclide particles. Every few seconds, a muon particle brushes past our body, with a probable provenance from a distant supernova—radiating photons sent through deep time with the immense energy released in the climatic explosion of a dying star. The notion of “seeing” supernovas through the split-second, barely perceptible particle trace is a paradox. Often used to assuage fears of radiation due to its weak materiality under Earth’s protective shield, cosmic radiation is ironically a potent cause of cancerous tumours in space exploration. The nuanced, polychromatic human and non-human narratives that one could draw from this study is humbling. Across the scales of dimensions and time, cosmic radiation works as a synecdoche. From the minuscule traces of elements emerge the vast, almost unimaginable whole.