Physics

NASA Awards Aircraft Operations Support Contract

NASA has selected L-3 Vertex Aerospace of Madison, Miss., to support the operations of all aircraft assigned to the agency's Dryden Flight Research Center at Edwards Air Force Base and the Dryden Aircraft Operations Facility in nearby Palmdale, Calif.

NASA's Hubble Maps 3-D Structure of Ejected Material Around Erupting Star

A flash of light from a stellar outburst has provided a rare look at the 3-D structure of material ejected by an erupting nova. Astronomers used NASA's Hubble Space Telescope to observe the light emitted by the close double-star system T Pyxidis, or T Pyx, a recurring nova, during its latest outburst in April 2011.

NASA Prepares for Launch of Next Solar Satellite

NASA's next scientific satellite, which is scheduled for launch June 26, will provide the most detailed look ever at the sun's lower atmosphere or interface region.

June Sky: Reckoning by Starlight

You'll never lose your way in the summer sky – even out in the boondocks – with these three stars to guide you.

Dense hydrogen in a new light

Hydrogen is the most abundant element in the universe. The way it responds under extreme pressures and temperatures is crucial to our understanding of matter and the nature of hydrogen-rich planets. New work using intense infrared radiation shines new light on this fundamental material at extreme pressures and reveals the details of a surprising new form of solid hydrogen.

Path to compact, robust sources for ultrashort laser pulses

Laser researchers are challenging a basic assumption of engineering: "You can't have it all." They have shown that for applications in biomedical optics, material processing, and communications, a new approach could deliver desired capabilities with no problematic tradeoffs: In compact, inexpensive, efficient and long-lived lasers that produce ultrashort, high-energy light pulses. They present experimental results with pulses as short as 60 picoseconds and predict that this technique will allow practical subpicosecond devices.

Researchers suggest gas cloud could reveal black holes near center of Milky Way galaxy

(Phys.org) —A team of researchers from Columbia University has published a paper in Physical Review Letters in which they suggest that the movement of gas cloud G2 near the center of our galaxy may reveal previously hidden small black holes. They note also that observation of G2's movement might lead to direct evidence of the existence of intermediate size black holes.

Cosmic rays: Galactic knee and extragalactic ankle

A new experiment has yielded the important result that a characteristic bend in the energy spectrum of high-energy cosmic rays, also called "knee", is located at different energies for light and heavy primary particles. Astronomers have found that these cosmic radiation particles are accelerated in galaxies other than the Milky Way.

Cool electron acceleration

Physicists have produced electron pulses from a laser accelerator whose individual particles all have nearly the same tuneable energy.

NASA's Swift Produces Best Ultraviolet Maps of the Nearest Galaxies

Astronomers at NASA and Pennsylvania State University have used NASA's Swift satellite to create the most detailed ultraviolet light surveys ever of the Large and Small Magellanic Clouds, the two closest major galaxies.

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