Ultra-high energy cosmic rays, which emerge in extreme astrophysical environments—like the roiling environments near black ...

On Mars, some of the most likely places to look for traces of ancient life may also be the least likely to preserve those ...

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 ...

Energetic particles that pop briefly into existence when cosmic rays hit Earth’s atmosphere could help assess hidden damage ...

Astronomers using the Chandra X-ray Observatory have detected an unusual mark left by collision between an “unidentified ...

Where does all that energy come from? For many years, scientists believed it came from shocks that occur in extreme astrophysical environments -- when, for example, a star explodes before forming a ...

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

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

Ultra-high energy cosmic rays, which emerge in extreme astrophysical environments—like the roiling environments near black holes and neutron ...

Astrophysicists have detected the most energetic electrons ever recorded raining down on Earth. With trillions of times the ...

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

Estonians will use advanced technology to rebuild Ukraine.