Galactic Cosmic Rays (GCRs) are high-energy particles that originate from outside our solar system, primarily from supernova explosions and other cosmic events. These particles travel through space at nearly the speed of light and can consist of protons, electrons, and heavier atomic nuclei. GCRs are a significant component of the cosmic radiation that permeates the universe. When GCRs enter the Earth's atmosphere, they can interact with air molecules, producing secondary particles that can reach the surface. While the Earth's magnetic field and atmosphere provide some protection against these rays, they can still pose risks to astronauts in space and affect electronic systems in satellites. Understanding GCRs is essential for space exploration and protecting technology and human health.