Cosmic radiation, also known as cosmic rays, refers to high-energy particles and radiation that originate from space and interact with Earth's atmosphere. There are several synonyms that can be used to describe this phenomenon, including galactic radiation, solar radiation, or space radiation. Cosmic radiation can also be broken down into subcategories such as primary cosmic rays, secondary cosmic rays, and tertiary cosmic rays. Other terms may include extraterrestrial radiation or high-energy radiation. These synonyms are commonly used in the field of astrophysics and have implications for the study of space weather, radiation protection, and the effects of cosmic rays on biological organisms.