Astronomers have detected an enormous γ-ray bubble that could be a source of the Milky Way’s most powerful cosmic rays — high-energy particles that rain down on Earth from space. The turbocharged ...

"For the first time, we could trace the boundary between the gas residing in galaxies and the material contained within the cosmic web through direct measurements." When you purchase through links on ...

Scientists have detected the most powerful cosmic ray seen in more than three decades. But the exact origin of this turbocharged particle from outer space remains a mystery, with some suggesting that ...