Interstellar space may look empty, but an icy object drifting between the stars faces a relentless bombardment that can slowly erase it. Cosmic rays and collisions with thin interstellar gas could ...

Add Yahoo as a preferred source to see more of our stories on Google. Illustration of the separation of the SWCX foreground emission from the cosmic X-ray sky, for the Western Galactic hemisphere. The ...

High-energy cosmic rays bombard Earth’s atmosphere from all directions in space. Powerful explosions on the Sun also generate streams of energetic particles that slam into Earth. For decades, ...

Millions of light-years away, millions of years ago, a star exploded. In this violent process, it ejected incredible amounts of mass, including carbon, nitrogen and oxygen—the building blocks of life.