cosmic radiation

Noun
  1. Radiation coming from outside the solar system (synset 111461657)
    is a type of: radiation - energy that is radiated or transmitted in the form of rays or waves or particles
    subtypes: cbr, cmb, cmbr, cosmic background radiation, cosmic microwave background, cosmic microwave background radiation - (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin
    has: cosmic ray - highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds

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