Assertion: cosmic ray | /r/HasProperty | alpha particles
Facets:
Source sentences:
text: Cosmic rays are highly energetic charged particles from beyond Earth, ranging from protons, alpha particles, and nuclei of many heavier elements.
text: Cosmic rays are a bit of a misnomer since they are actually high energy particles like protons or alpha particles traveling at relativistic speeds (matter), not electromagnetic radiation (energy), so they don't have a canonical frequency range such as, for example, visible light, x-rays, gamma rays, and so forth.