Cosmic ray detection involves measuring high-energy particles that originate from outer space and collide with Earth's atmosphere. These particles, known as cosmic rays, can come from various sources, including supernovae and active galactic nuclei. Detecting them helps scientists understand fundamental processes in the universe and the nature of matter. To detect cosmic rays, researchers use specialized instruments like cloud chambers and scintillation detectors. These devices can capture the trails left by cosmic rays as they interact with matter. By analyzing the data collected, scientists can learn about the composition, energy, and origin of these mysterious particles.