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News
Retreiving data from a black hole Mar 2
Quantum information could be retrieved from a black hole, according to new calculations by a theoretical physicist in the US. Seth Lloyd of the Massachusetts Institute of Technology has found that only a tiny amount of information -- just half a quantum bit, or "qubit" -- is lost from the black hole regardless of how many bits are in the hole to begin with. The unexpected discovery means that a black hole could behave as a good quantum computer and be used to perform useful calculations -- if only we knew how to program it (Phys. Rev. Lett. 96 061302).
Milky Way X-ray mystery solved Mar 2
Astronomers have found evidence that the diffuse haze of X-rays that envelopes the Milky Way is produced by hundreds of millions of individual stars. Until now, the "galactic X-ray background" was thought to be caused by clouds of hot gas in the galaxy. The discovery, made by Mikhail Revnivtsev of the Max Planck Institute for Astrophysics in Germany and colleagues, means that the Milky Way could contain many more stars than previously thought (Astronomy and Astrophysics to be published).
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