Dark matter may be far more complicated than scientists once believed. A new study suggests it could consist of at least two ...

A mysterious glow at the center of our galaxy has astronomers scratching their heads. The phenomenon, recently analyzed in greater detail, has intensified the debate over whether this glow originates ...

Over the last 100 years, countless studies have proven that Albert Einstein's greatest theory — his theory of general relativity — is practically bulletproof, capable of everything from predicting ...

When Voyager 1 finally crossed the “termination shock” at the edge of interstellar space in December 2004, space physicists anticipated the long-sought discovery of the source of anomalous cosmic rays ...

Researchers at the CERN particle physics laboratory in Geneva, Switzerland, report new evidence supporting the theory that cosmic rays may be amplifying the sun’s impact on global temperatures and ...

Galactic cosmic rays — high-energy particles from outside the solar system — could theoretically power life on certain frigid worlds. The radiation can trigger chemical reactions underground, whose ...

Observations of a cosmic explosion detected on Feb. 15 by two NASA satellites have thrown into doubt one popular explanation for such explosions and have also seriously weakened the argument for yet ...