Scientific Highlights

The highest energy cosmic rays remain elusive and mysterious, and their study requires extraordinary efforts.

Maxwell’s unified description of electric and magnetic phenomena is one of the greatest achievements of 19th century physics.

Cosmic rays are energetic particles, mostly atomic nuclei, raining down upon the Earth from the depths of the cosmos.

For the first time, the Pierre Auger Collaboration introduces the use of muon fluctuations to constrain Lorentz invariance violation.

The Pierre Auger Collaboration has now presented a new measurement of the depth of shower maximum, X_max, using 17 years of fluorescence-detector data and an exposure 2.4 times larger than in the previous analysis.

First proof-of-principle measurement of muons in inclined air showers using radio and water Cherenkov detectors at the Pierre Auger Observatory.