For years, astronomers have searched for the origins of ultra-high-energy cosmic rays, the most powerful particles in the universe. These energetic travelers move at nearly the speed of light, packing ...

The most powerful cosmic rays in the universe currently have no explanation. New research suggests that exotic, self-annihilating particles in our own galaxy may hold the answer.

A strange energy source at the center of the Milky Way may be a new type of dark matter. Scientists found that hydrogen gas ...

The cosmic ray subsystem shut off on Voyager 1 last week included a trio of telescopes studying and measuring cosmic rays, or ...

For over 40 years, astronomers have been puzzled by strange X-ray signals from the Helix Nebula’s white dwarf. Now, they may ...

Opinion High energy neutrinos are the coolest particles in astrophysics. Born in distant cosmic cataclysms, they speed ...

The U.S. Naval Research Laboratory (NRL), in partnership with NASA's Marshall Space Flight Center (MSFC), has developed ...

The rate of stars going supernova near Earth appears to match two mass extinctions -- 372 million years ago and 445 million ...

So their deep dive into the very beginning of life as we know it revealed that water was born from epic rays of light about ...

Voyager 1 crossed into interstellar space in 2012, followed by Voyager 2 in 2018, making them the only spacecraft to operate ...

In a recent study published in the Journal of Geophysical Research: Atmospheres, scientists from Los Alamos National ...

NASA is switching off two science instruments on its twin Voyager spacecraft to save power. The space agency said Wednesday an instrument on Voyager 2 that measures charged particles and cosmic rays ...