Cosmic ray

Definition

Cosmic rays or astroparticles are high-energy particles or clusters of particles that move through space at nearly the speed of light. They originate from outside of the Solar System in the Milky Way, from distant galaxies, and from the Sun. Upon impact with Earth's atmosphere, cosmic rays produce showers of secondary particles, some of which reach the surface, although the bulk are deflected off into space by the magnetosphere or the heliosphere.

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Buford Price PAH world hypothesis PERDaix Pampa Partial Test Ban Treaty Particle accelerator Particle radiation Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics PeV Phosphine Phosphorus-32 Phosphorus mononitride Phosphorus monoxide Photodissociation region Photon energy Photons Physical Review Letters Physikalische Zeitschrift Pierre Auger Collaboration Pierre Auger Observatory Pierre Victor Auger Pion Pliocene Polar route Polycyclic aromatic hydrocarbon Polyyne Positron Potassium-40 Potassium chloride Potassium cyanide Proceedings of Science Propadienylidene Propene Propionaldehyde Propionitrile Propynal Propyne Propynylidyne Proton Protonated carbon dioxide Protonated cyanoacetylene Protonated formaldehyde Protonated hydrogen cyanide Pseudo-panspermia Pyrene Pyrimidine Qantas Flight 72 Quantum computer Quantum decoherence QuarkNet Quasar Qubit RNA world hypothesis Radiation Radiation assessment detector Radiation damage Radiation dose Radiation exposure Radiation hardening Radiation protection Radiation therapy Radio galaxy Radio wave Radioactive contamination Radioactive decay Radioactive source Radioactivity in the life sciences Radiobiology Radiocarbon dating Radionuclide Radiosonde Radon Random-access memory Robert E. 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