Cosmic Radiation

**Definition:** High-energy radiation or particles from extraterrestrial space that strike the earth, its atmosphere, or spacecraft and may create secondary radiation as a result of collisions with the atmosphere or spacecraft.

**Tree numbers:** - G01.060.185 - G01.750.750.235 - G16.500.200 - N06.230.300.100.300

**Synonyms:** - Radiation, Cosmic