Cosmology

A disagreement between observations of galaxy clusters and the cosmic background radiation could be explained by the existence of a fourth type of neutrino
 

A puzzle from the big bang's echo is solved using the technique of gravitational lensing

Scientific American technology editor Seth Fletcher talks about the recent Consumer Electronics Show and astronomy editor Clara Moskowitz discusses last month's American Astronomical Society conference  

 

The notion of an "event horizon," from which nothing can escape, is incompatible with quantum theory, Hawking says

Able to detect light from the first stars just 380,000 years after the big bang, the Square Kilometer Array will be the world's biggest radio observatory and promises to spur science and economic development in Africa

Astronomers say it's the first direct imaging of the long-sought gas filaments stretching between galaxies

One of the nearest stellar explosions since 1987 could become visible in two weeks to skywatchers using binoculars

The European Space Agency's probe was successfully awoken from hibernation Monday and will begin preparations  to explore a comet

Astronomers have measured a distance scale in the universe to unprecedented accuracy, opening the door to better tests of dark energy models than ever before

The sun's gravitational pull on dark matter particles may cause seasonal patterns not previously expected

As observations fail to pin down the so-far undetectable stuff, explanations once considered fringe are now getting another look

The ancient cosmology could explain the apparent motion of the planets using just their movements around circles