Links for 2011-04-29

"A new experiment from the ALPHA collaboration, based at CERN, has created and trapped antihydrogen atoms for 1000 seconds, 6000 times longer than their previous attempts which trapped antihydrogen for 172 ms. Having antihydrogen trapped for this period allows the possibility of studying fundamental properties of antimatter in detail including the possibility of how it is affected by gravity. Although antimatter is believed to fall under gravity, that needs to be checked along with the other basic principles of physics."

"Using the prolific planet hunting Kepler spacecraft, astronomers have discovered 1,235 candidate planets orbiting other suns since the Kepler mission's search for Earth-like worlds began in 2009. To find them, Kepler monitors a rich star field to identify planetary transits by the slight dimming of starlight caused by a planet crossing the face of its parent star. In this remarkable illustration, all of Kepler's planet candidates are shown in transit with their parent stars ordered by size from top left to bottom right. Simulated stellar disks and the silhouettes of transiting planets are all shown at the same relative scale, with saturated star colors. "