Recent gamma-ray observations support the longstanding theory that superspeedy particles called cosmic rays have their origin in the havoc-ridden regions around young star clusters.
Observations out of Antarctica support the idea that the most energetic of the superspeedy space particles raining down on Earth are not from gamma-ray bursts. The new result prolongs a long-standing mystery in astrophysics.
A cluster of detections in the Northern Hemisphere sky might point to a source for the most energetic particles bombarding Earth's atmosphere.
Astronomers have found the gamma-ray-emitting remains of three exploded stars, and the remnants might reveal the origin of cosmic rays.
Astronomers have detected more extremely energetic cosmic particles coming from one side of the sky than the other.