Cosmic Ray Observatories (e.g., Pierre Auger Observatory)

Cosmic Ray Observatories, like the Pierre Auger Observatory, are large-scale scientific facilities designed to study high-energy particles from space called cosmic rays. When these particles hit Earth's atmosphere, they create cascades of secondary particles that can be detected on the surface or in the atmosphere. By analyzing these signals, scientists learn about the origins and properties of cosmic rays, helping to understand extreme cosmic events and phenomena in the universe. These observatories use a combination of detectors spread over vast areas to capture and study these rare, energetic particles.