Physics

NASA Opens Media Accreditation, Announces Events for Shuttle Atlantis' Final Move

Media accreditation is open for activities surrounding space shuttle Atlantis' move to the Kennedy Space Center Visitor Complex in Florida for permanent public display.

Freezing electrons in flight: Physicists catch electrons getting knocked out of atoms

Using the world's fastest laser pulses, which can freeze the ultrafast motion of electrons and atoms, physicists have caught the action of molecules breaking apart and electrons getting knocked out of atoms. Their research helps us better understand molecular processes and ultimately be able to control them in many possible applications.<img src="http://feeds.feedburner.com/~r/sciencedaily/matter_energy/physics/~4/w0l... height="1" width="1"/>

Accelerators can search for signs of Planck-scale gravity

(Phys.org)—Although quantum theory can explain three of the four forces in nature, scientists currently rely on general relativity to explain the fourth force, gravity. However, no one is quite sure of how gravity works at very short distances, in particular the shortest distance of all: the Planck length, or 10-35 m. So far, the smallest distance accessible in experiments is about 10-19 m at the LHC.

Another advance on the road to spintronics: Researchers unlock ferromagnetic secrets of promising materials

Using a new technique called HARPES, for Hard x-ray Angle-Resolved PhotoEmission Spectroscopy, researchers have unlocked the ferromagnetic secrets of dilute magnetic semiconductors, materials of great interest for spintronic technology.<img src="http://feeds.feedburner.com/~r/sciencedaily/matter_energy/physics/~4/rXX... height="1" width="1"/>

Claim of supersolid helium disproved by original researcher

(Phys.org)—Moses Chan, co-author of a paper published in 2004 describing work that resulted in claims of the discovery of supersolid helium, has now co-authored another paper, published in Physical Review Letters, describing flaws in his original research. He and new colleague Duk Kim redesigned the original experiment: this time, they found no evidence of a supersolid.

Researchers replicate white dwarf photospheres in lab using X-ray machine

(Phys.org)—Researchers at Sandia Labs have used a large x-ray machine to create high-density plasma that approximates the photosphere of white dwarf stars. The team has posted a paper describing the process and how it can be used to assist astronomers to the preprint server arXiv.

Freezing electrons in flight

(Phys.org)—Using the world's fastest laser pulses, which can freeze the ultrafast motion of electrons and atoms, University of Arizona physicists have caught the action of molecules breaking apart and electrons getting knocked out of atoms. Their research helps us better understand molecular processes and ultimately be able to control them in many possible applications.

NASA Commercial Crew Partner Blue Origin Completes Rocket Engine Thrust Chamber Test

NASA's Commercial Crew Program (CCP) partner Blue Origin has successfully fired the thrust chamber assembly for its new 100,000 pound thrust BE-3 liquid oxygen, liquid hydrogen rocket engine.

NASA Selects Contracts for Safety

NASA has selected Earth Resources Technology, Inc., (ERT), Laurel, Md., to receive a contract for safety, environmental, and medical support services at the agency's Ames Research Center, Moffett Field, Calif. The contract has a maximum value of $55 million.

NASA and United Launch Alliance Complete Space Act Agreement

NASA partner United Launch Alliance (ULA) has completed the fifth and final milestone for its Commercial Crew Development Round 2 (CCDev2) agreement with the agency's Commercial Crew Program.

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