September 7, 2012  |   This image of the whirlpool galaxy, also called Messier 51, was captured by the Sloan Digital Sky Survey, which has already mapped more than 100 million galaxies in three dimensions. Image by the Sloan Digital Sky Survey and Robert...

February 6, 2012  |   An artist's conception of an exoplanet hosting smaller moons. Image by David A. Aguilar/ CfA. Astronomers have discovered a trove of exoplanets--more than 700 worlds in orbit around distant stars, with leads on thousands of additional suspects. So now,...

December 2, 2011  |   Usually a finicky phenomenon limited to tiny, ultracold objects, entanglement has now been achieved for macroscopic diamonds at room temperature Diamonds have long been available in pairs--say, mounted in a nice set of earrings. But physicists have now taken...