Scientific Highlights

Recently, the Pierre Auger Collaboration systematically studied the distribution of ultra-high-energy cosmic rays at an intermediate angular scale...

When ESA's groundbreaking Aeolus satellite began experiencing a mysterious signal loss in 2019, help came from the Pierre Auger Observatory.

As part of the AugerPrime upgrade, scintillator detectors (SSD) have been added to the existing water-Cherenkov surface detector stations.

The Pierre Auger Collaboration measured a dipolar anisotropy in the arrival-direction distribution of the cosmic rays with energies in excess of 8x10¹⁸ eV, finding that the flux is about
6.5% larger than the average in one direction of the sky and it is correspondingly smaller in the opposite direction.

One of the biggest challenges in cosmic-ray physics is to accurately pin down the absolute energy of a measured cosmic ray.

Billions of subatomic particles can be created in cosmic-ray induced air showers.