You searched for: “cosmic radiation
cosmic radiation (s) (noun), cosmic radiations (pl)
Radiation by cosmic rays, consisting chiefly of protons, with some electrons and atomic nuclei: Cosmic radiations involves their collision or reaction with particles in the atmosphere which includes a wide variety of secondary radiations known as a cosmic ray showers.
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cosmic radiation (s) (noun) (no pl)
Cosmic rays collectively: Streams of high-energy particles from outer space, consist of protons, alpha particles, and light nuclei, which collide with atomic nuclei in the Earth's atmosphere, and produce secondary nuclear particles.

Primarily mesons (elementary particles are responsible for the forces in the atomic nucleus), such as pions and muons (types of subatomic particles), that shower the Earth.

This entry is located in the following unit: Astronomy and related astronomical terms (page 7)