Pierre Auger was a French physicist born in 1899, known for his significant contributions to the field of cosmic rays. He is best recognized for the discovery of the Auger effect, which describes the process by which an excited atom releases energy through the emission of an electron, rather than through light. This phenomenon has important implications in various fields, including materials science and nuclear physics. In addition to his work on the Auger effect, Pierre Auger played a crucial role in the development of the Pierre Auger Observatory, a large-scale research facility located in Argentina. This observatory is dedicated to studying ultra-high-energy cosmic rays and aims to understand their origins and properties. The facility utilizes an extensive array of detectors to collect data on cosmic ray events.