Cosmic radiation consists of high-energy, charged particles moving in outer space at immense speeds, close to the speed of light. Its sources can include objects such as the Sun, black holes ...

Many people are understandably afraid of radiation, thanks to Hollywood, but radiation is part of everyday life—there are many sources of natural “background ... cosmic radiation at higher altitudes ...

In winter, incoming solar radiation and outgoing terrestrial radiation can greatly change the temperature of an air mass. Thick clouds can greatly reduce the amount of solar radiation that reaches ...