AlphaMagneticSpectrometer
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AMS detects excess of positrons, could suggest existence of dark matter
We've been waiting with bated breath all afternoon to find out what NASA, MIT and the Department of Energy has observed with the Alpha Magnetic Spectrometer. Well, we still don't quite understand the exact nature of dark matter, but highly precise measurements of positron fraction (the ratio of positrons to electrons and protons) do bring us a small step closer to proving the existence of the theoretical material. The AMS found a small excess of positrons coming from all directions instead of a single source. That could indicate the presence of dark matter, which is believed to generate the antimatter particles when it collides and annihilates itself. As usual though, this is far from conclusive. The excess of positrons could be caused by a number of cosmic phenomenon, including pulsars, but researchers are hopeful that further testing will narrow down the possibilities. Those of you hoping for direct and obvious evidence of dark matter may be a little disappointed, but let's be honest -- you were being overly optimistic. Besides, don't you want some mysteries left to solve? For more information, check out the PR after the break.
PSA: Watch the AMS dark matter results announcement at 1:30PM ET (video)
The universe is thought to be composed of stuff, non-stuff and maybe some other stuff. We're referring, of course, to matter, anti-matter and as-yet illusive dark matter. While we know a fair amount about matter and its opposite, dark matter is still largely theoretical. That might change in around half an hour, though, as folks from NASA, MIT and the US Department of Energy hold a press conference to explain exactly what the Alpha Magnetic Spectrometer (AMS) strapped to the ISS has been seeing during almost two years of space-scanning. Samuel Ting from MIT, who will be on the panel, implied back in February that today's results will provide the first evidence of dark matter's existence -- if that's the right term. The press conference is due to start at 1:30PM EDT, so make sure to tune in to the NASA TV livestream embedded below for what could be the biggest scientific news since Higgs and his boson. [Image Credit: NASA]
Space Shuttle Endeavour lifts off one last time (video)
NASA's Endeavour shuttle marked its final launch today, lifting off from Cape Canaveral, Florida, a fortnight after an initial takeoff was scrubbed over concerns surrounding an auxiliary power unit heater. A six-member crew lead by commander Mark Kelly and some tiny satellites are on-board for the STS-134 mission, which involves the delivery of the massive cosmic ray-collecting Alpha Magnetic Spectrometer and some spare parts to the International Space Station. NASA's 134th flight is the penultimate mission for the current fleet of shuttle -- Atlantis will liftoff for a final time in July. Video of the smoke-filled majesty after the break.
NASA says International Space Station is now 'essentially' complete
The news got a bit overlooked among the hubbub of Discovery's final flight and the first humanoid robot sent into space, but the recently completed shuttle mission also marked another significant milestone: it delivered the final room to the International Space Station. While there are still some additional components to be added, the new room dubbed the "Permanent Multipurpose Module" is NASA's final contribution to the actual assembly of the station and, according to the agency, it means that it has "essentially completed" all that it had planned. The two remaining shuttle missions will just be carrying supplies and spare parts, along with a little $1.5 billion experiment called the Alpha Magnetic Spectrometer, which will be used to search for fun stuff like antimatter galaxies and dark matter.
$2 billion antimatter detector to go on last shuttle mission, taxpayers agree it better find -something
The airspace above the Atlantic Ocean will get a lot more expensive tomorrow as a U.S. Airforce Galaxy jet transports the Alpha Magnetic Spectrometer -- developed at CERN -- from Geneva to the Kennedy Space Center in Florida. The last-ever Space Shuttle mission in February will transport the AMS to the International Space Station, where it will stay docked for 20 years to "search for antimatter and dark matter by measuring cosmic rays." We're not sure what that means, but we trust it will lead to a microwave that heats the interior of our Hot Pockets while keeping the crust crisp and flaky, bringing us one step closer to World Peace.[Image credit: US Mission Geneva's flickr]
