Cosmic ray

Cosmic rays can loosely be defined as radiation consisting of energetic particles originating outside of the Earth. The composition of such rays includes electrons, protons, gamma rays, and atomic nuclei from a large region of the periodic table. Though neutrons are not stable, the relativistic time dilation may allow them to reach Earth at very high energies.

Types of cosmic radiation

• Anomalous cosmic ray
• Galactic cosmic ray
• Solar cosmic ray
• Ultra-high energy cosmic ray