LHC closes in on massive particle. 23 July 2010Last updated at 20:33 By Paul Rincon Science reporter, BBC News, Paris CMS is one of two "multi-purpose" experiments housed at the LHC Physicists at the Large Hadron Collider (LHC) have seen several candidates for the heaviest elementary particle known to science. If the observations are confirmed, it would be a first for Europe; so far, the top quark particle has only been generated by one lab in the US. Dr Arnaud Lucotte said the discovery could assist physicists in the hunt for the elusive Higgs boson, or "God particle". Details of the top quark candidates were presented at a major particle physics conference in Paris. The International Conference on High Energy Physics (ICHEP) runs from 22-28 July. The Large Hadron Collider is operated by the European Organization for Nuclear Research (Cern), based in Geneva.
The LHC is a giant accelerator machine housed in a 27km-long (17 miles) tunnel under the French-Swiss border. 'Striking event' Hunting the Higgs. MSNBC's Countdown Interview with Lawrence O'Donnell discussing Planet X, 2012 & Water on the Moon. Scientists discover most accurate clocks in the universe. Time in space has always been an elusive issue for scientists who have long struggled to find a constant standard. But a new discovery may help us understand time as never before. Space.com reports that scientists are now using pulsars — rapidly spinning stars that pulse over time — to tell the universe’s time. This is due to a recent revelation about how pulsars function and rotate. A pulsar is a rotating neutron star that emits a beam of electromagnetic radiation. When this radiation is pointed towards the Earth, we can see it much as we see the light from a lighthouse.
Discovered in 1967 by Jocelyn Bell Burnell, pulsars occur in space when a star collapses, smashing the protons and electrons together into neutrons. It seems that these super heavy lighthouses of the universe are also predictable and steady in their actions. Why is constant time in the universe important? Further, experts hope that this new clock can help solve at least one space mystery. For further reading: Beam Me Up, Scotty! Scientists Teleport Info 10 Miles. - Scientists manage to teleport information nearly 10 miles with unprecedented precision. - The team used quantum entanglement to teleport the information. - The feat could lead to a global, impenetrable communication network and powerful quantum computers. Scotty won't beam anybody anywhere anytime soon, but a new report by Chinese scientists shows that it is possible to transmit information over long distances using quantum entanglement. The research, published in the current issue of the journal Nature Photonics, could lead to faster and smaller quantum-based computers and unbreakable, encrypted communication across the world.
The team reported they were able to "teleport" information 16 kilometers, or 9.9 miles. In science fiction, teleportation usually describes the transfer of matter from one point to another, more or less instantaneously. In their new experiment, the Chinese scientists managed a quantum leap forward for quantum teleportation. Scotty would be impressed. Is Time Disappearing from the Universe? (A Weekend Feature)
Scientists previously have measured the light from distant exploding stars to show that the universe is expanding at an accelerating rate. They assumed that these supernovae are spreading apart faster as the universe ages. Physicists also assumed that a kind of anti-gravitational force must be driving the galaxies apart, and started to call this unidentified force "dark energy". The idea that time itself could cease to be in billions of years - and everything will grind to a halt - has been proposed by Professor José Senovilla, Marc Mars and Raül Vera of the University of the Basque Country, Bilbao, and University of Salamanca, Spain.
The corollary to this radical end to time itself is an alternative explanation for "dark energy" - the mysterious antigravitational force that has been suggested to explain a cosmic phenomenon that has baffled scientists. However, to this day no one actually knows what dark energy is, or where it comes from. Beginners Guide to Aerodynamics.
At this Web site you can study aerodynamics at your own pace and to your own level of interest. Some of the topics included are: Newton's basic equations of motion; the motion of a free falling object, that neglects the effects of aerodynamics; the terminal velocity of a falling object subject to both weight and air resistance; the three forces (lift, drag, and weight) that act on a glider; and finally, the four forces that act on a powered airplane. Because aerodynamics involves both the motion of the object and the reaction of the air, there are several pages devoted to basic gas properties and how those properties change through the atmosphere. This site was created at NASA Glenn as part of the Learning Technologies Project (LTP). It is currently supported by the Aeronautics Research Mission Directorate at NASA HQ through the Educational Programs Office at NASA Glenn.
There is a special section of the Beginner's Guide which deals with compressible, or high speed, aerodynamics. Interactive Physics.