Two types of stellar hazards can create higher-than-normal levels of ionizing radiation: solar flares
and cosmic rays
release tremendous amounts of electromagnetic energy (including harmful ultraviolet rays and X-rays), as well as highly charged protons and electrons. The effects are comparable to a radioactive blast from one hundred million billion tons of TNT (compared to the 20,000-ton equivalent blasts that destroyed Hiroshima and Nagasaki). Fortunately, while solar flares
aren't rare, they are predictable.
An unprotected creature exposed to radiation from a solar flare
is treated as "severely irradiated" for the purposes of determining the radiation's effects (see Table: Radiation Exposure).
, unlike solar flares
, cannot be predicted. Consisting of subatomic particles moving
at relativistic speeds, these rays can penetrate miles of solid mass (though extremely few get through the Earth's atmosphere without colliding with other atoms or molecules, effectively rendering them harmless). In space, these subatomic particles can cause severe cell damage
, even genetic mutation
An unprotected creature exposed to radiation from a cosmic ray
shower is treated as "highly irradiated" for the purposes of determining the radiation's effects (see Table: Radiation Exposure).