Cosmology

If different wavelengths of light experience spacetime differently, the big bang may never have happened

Stars racing out of the galaxy could offer clues about dark matter

Physicists line up to crack a long-standing particle puzzle

The images show startling detail of the increasingly bright ISON on November 14, when the comet entered full outburst mode

A newly analyzed Kuiper Belt object is posing a challenge to planet-formation theories

The most precise measurement yet of the electron’s shape casts doubt on ideas such as supersymmetry that predict a zoo of undetected particles in the universe

Heat differences meant impacts left larger, shallower basins on the lunar surface that faces Earth

Neutrinos from deep space are opening up a new kind of astronomy

Astronomers are discovering distant planets that orbit two-star systems, uncovering bizarre and wondrous worlds unlike anything in our solar system

A gigantic star in the Whirlpool galaxy has vanished, solving a supernova mystery

Seeing Saturn through a telescope can leave a ringing in one's ears

With a density nearly identical to that of our planet, the exoplanet Kepler 78 b is just 20 percent wider and about 80 percent more massive than Earth