Space radiation is a topic of growing importance to scientists and researchers as well as the general public. This thorough reference text covers space radiation and its biological effects. The book addresses the sources and various types of space radiation as well as the astrophysical phenomena responsible for the generation of this radiation. It describes the radiation encountered by astronauts and the potential health effects during present and proposed future missions, including that encountered in transiting the Van Allen Belts and inter-planetary space. It also describes the radiation stemming from the solar wind, solar flares and other sources of sporadic "solar particle events", and the radiation originating from extra-solar or galactic origins.