Ionizing radiation that originates from our sun and other stars in the universe. Cosmic rays are penetrating bundles of energy like gamma rays, but most are filtered out by the earth's atmosphere. The higher in altitude we go (e.g. mountains, jets), the more we can be exposed to them. Cosmic rays are part of background radiation.
High-energy type wave or particle radiation coming from deep space. Cosmic rays are the most penetrating and dangerous radiation types.
Radiation from space that reaches the earth from all directions
Energetic particles and rays from space, that strike the Earth at nearly the speed of light.
radiation consisting of cosmic rays
radiation produced in outer space when heavy particles from other galaxies (nuclei of all known natural elements) bombard the earth. See also background radiation, terrestrial radiation.
High energy rays from space which, in space, are primarily protons (92%) and alpha particles (6%). In space, cosmic rays come from all directions.
penetrating ionizing radiation , both particulate and electromagnetic, originating in space. Secondary cosmic rays, formed by interactions in the earth's atmosphere, account for about 45 to 50 millirem annually.
Cosmic of or relating to the cosmos, the extraterrestrial vastness, or the Universe in contrast to the Earth alone. radiation of the cosmos left over from the Big Bang, a theory in which the expansion of the Universe is presumed to have begun with a primeval explosion.
Radiation that reaches the Earth from outer space.
radiation that originates from the nuclear process which drive stars and galaxies. We are constantly being bombarded by high energy cosmic radiation.
A general term for background radiation from nonspecific galactic and extra- galactic sources. It includes both high-energy particle radiation in the form of cosmic rays and low-energy microwave emission with a brightness temperature of 2.7 K.
Streams of atomic nuclei bombarding Earth and other planets from outer space.
