particles

Japanese space officials have found intriguing dust-like particles inside the sample capsule from the asteroid probe Hayabusa, but whether they are actually pieces of an asteroid or contamination from Earth remains to be seen, Japan's space agency announced Tuesday. The tiny particles were...

The seemingly inescapable fact that matter and antimatter particles destroy each other on contact has long puzzled physicists wondering how life, the universe or anything else can exist at all. But new results from a particle accelerator experiment suggest that matter does seem to win in the...

From the propeller-shaped disturbances and embedded moonlets in the A ring inward to the nearly transparent D ring and outward to the bright arc circling the faint G ring, NASA's Cassini spacecraft has given astronomers a new look at the complex system of rings circling Saturn. Six years into...