Using a decade’s worth of data from the H.E.S.S. telescopes in Namibia, they’ve observed a sharp kink in the energy spectrum ...

Scientists have a problem with cosmic rays—they produce too many muons at the Earth's surface. Cascades of muons are ...

New research reports the most powerful cosmic rays ever detected. Because the rays lose energy as they travel through space, ...

The most energetic cosmic rays are accelerated in extremely energetic events, like around supermassive black holes. But those ...

Scientists at the HESS observatory in Namibia have found the most energetic cosmic rays ever detected, reaching up to 40 ...

The most powerful cosmic-ray electrons and positrons ever detected slamming into Earth's atmosphere carry energies so high they can only have come from relatively close by, new research has revealed.

Scientists with the HESS Observatory have identified the most energetic cosmic electrons ever observed. What could this mean ...

They are affected by magnetic fields throughout the Universe and arrive at Earth from all directions. These particles also ...

Scientists have a problem with cosmic rays—they produce too many muons at the Earth's surface. Cascades of muons are byproducts of high-energy cosmic rays as they collide with nuclei in the ...

The High Energy Stereoscopic System is a ground-based gamma-ray telescope in the highlands of Namibia and sensitive in the ...