Cosmic particles, also known as cosmic rays, are high-energy particles that originate from outer space and travel through the universe. They primarily consist of protons, but can also include heavier atomic nuclei and electrons. When these particles enter the Earth's atmosphere, they collide with air molecules, creating a cascade of secondary particles that can be detected by scientific instruments. These particles are of great interest to scientists because they can provide valuable information about the universe's origins and the processes occurring in distant celestial bodies. Studying cosmic particles helps researchers understand phenomena such as supernovae, black holes, and the overall structure of the universe, contributing to fields like astrophysics and particle physics.