Theosis sends word that an astronomer at the University of Rochester and his colleagues have made the surprise discovery that Alcor, one of the brightest stars in the Big Dipper, is actually two stars; and it is apparently gravitationally bound to the four-star Mizar system, making the whole group a sextuplet. This would make the Mizar-Alcor sextuplet the second-nearest such system known. The discovery is especially surprising because Alcor is one of the most studied stars in the sky. The Mizar-Alcor system has been involved in many "firsts" in the history of astronomy: "Benedetto Castelli, Galileo's protege and collaborator, first observed with a telescope that Mizar was not a single star in 1617, and Galileo observed it a week after hearing about this from Castelli, and noted it in his notebooks... Those two stars, called Mizar A and Mizar B, together with Alcor, in 1857 became the first binary stars ever photographed through a telescope. In 1890, Mizar A was discovered to itself be a binary, being the first binary to be discovered using spectroscopy. In 1908, spectroscopy revealed that Mizar B was also a pair of stars, making the group the first-known quintuple star system."

An anonymous reader writes "Twitter's been hit by a big phishing scam. Culture Crash blogger Dan Tynan says this is the end of Twitter's innocence. Will tweets become like email, with two out of every three just worthless spam?"

Antiglobalism writes "Scientists say they have found a workable way of reducing CO2 levels in the atmosphere by adding lime to seawater. And they think it has the potential to dramatically reverse CO2 accumulation in the atmosphere, reports Cath O'Driscoll in SCI's Chemistry & Industry magazine published today."

"The Washington Times is reporting that the DHS wants to replace your boarding pass with a GPS-enabled shock bracelet. Plans for the device include subduing passengers remotely as well as onboard interrogation. There's even a promotional video." Perhaps Paul Ruwaldt (the official named in this story) has been watching "The Coneheads" a bit too much, or not actually flying enough. Expressing interest is not quite the same as ordering mass quantities, but it's scary enough.

Michelle Shildkret from Time wrote in to tell us about a story about "the ethics of stealing Wi-Fi. Many of us been guilty of the same crime at one point or another — according to the article, 53% of us at least. But how guilty do we really feel? As it is officially a crime to steal wi-fi (Title 18, Part 1, Chapter 47 of the United States Code, which covers anybody who 'intentionally accesses a computer without authorization or exceeds authorized access')."

esocid alerts us to news out of the University of Michigan, where physics researchers have found a way to focus microwaves to a point 20 times smaller than their wavelength using a new 'superlens'. Such resolution was thought to be impossible until recent years, and it could bring about the capability to transfer power wirelessly. "No matter how powerful a conventional lens, it cannot focus light down to more than about half its wavelength, the 'diffraction limit'. This limits the amount of data that can be stored on a CD, and the size of features on computer chips. The new lens is a 127-micrometer-thick plate of teflon and ceramic with a copper topping. 'The beauty of these is that they're planar,' Grbic says, 'they're easy to fabricate.' The lenses can be made through a single step of photolithography, the process used to etch computer chips."