Cosmic rays are high-energy particles that originate from outer space, such as the sun or other astronomical sources. They consist mainly of protons, electrons, and atomic nuclei, and can travel at nearly the speed of light. Cosmic rays can interact with Earth's atmosphere, generating secondary particles that can be detected on the surface. Studying cosmic rays provides valuable information about the origins and properties of these particles, as well as insights into astrophysical phenomena such as supernovae, black holes, and the overall structure of the universe. Research in this area often involves the use of specialized detectors and observatories to collect and analyze data.