SAMPLE OF THE COSMOS. “These particles are thus a genuine sample of solar, galactic, and extragalactic matter that includes all known nuclei and their long-lived isotopes, as well as electrons and antiparticles. This makes the CR radiation a unique messenger to probe high-energy phenomena. The CR energy spectrum extends several orders of magnitude from ~10(6) eV to about ~10(21) eV.” (CR = cosmic ray).
https://link.springer.com/content/pdf/10.1007/s10686-021-09708-w.pdf