Wednesday, September 3, 2014
Magnetic stripes of solar material – with alternating south and north polarity – march toward the sun’s equator. Such observations may change the way we think about what’s driving the sun’s 22-year solar cycle. (Credit: S. McIntosh)
VIDEO via abcnews
This image illustrates Dawn’s spiral transfer from high altitude mapping orbit (HAMO) to low altitude mapping orbit (LAMO). The trajectory turns from blue to red as time progresses over two months. Red dashed sections are where ion thrusting is stopped so the spacecraft can point its main antenna toward Earth. (Credit: NASA/JPL-Caltech) via
The little mushroom cap between the two high-gain antennas is the X-band low-gain antenna. The little blue thing is DCAM3, a deployable camera that will hopefully take pictures of the explosion and impact of Hayabusa’s “Small Carry-on Impactor” while the mothership hides safely in the shadow of the asteroid. (Credit: Lakdawalla) via
Phase change materials can switch between two forms depending on how quickly they’re cooled. Cool them quickly and you get an amorphous form, which provides significant resistance to the flow of electrons. Cool them slowly and they will allow electrons to flow more readily. Once cooled, these two forms remain stable, locking the differences in conduction in place. (Credit: Columbia University, Timmer) via
Rosetta scientists will be heading to Lisbon, Portugal, next week to present their early impressions of the comet to their peers. via
The Yarkovsky Effect: The daylight side absorbs the solar radiation. As the object rotates, the dusk side cools down and hence emits more thermal photons than the dawn side. It may be possible to exploit this effect for planetary defense. via
An event in the IceCube neutrino telescope. Photomultipliers attached to strings buried deep in the Antarctic ice detect the bursts of light emitted when a neutrino collides with the ice and produces a muon. The event shown was generated by an upward moving muon, which was produced by an upward moving muon neutrino that passed through the Earth. APS/Joan Tycko; via
A 1974 photo of the part named Intersection 5 (I5) of the ISR of CERN’s old PS, clearly shows the layout of the magnets and the crossing of the two beams pipes. (Credit: Salem) via
Russian power engineering R&D institute NIKIET has completed the engineering design for the BREST-300 lead-cooled fast reactor. (NIKIET) via
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Thursday, August 28, 2014
“This is a long-standing, really neat experimental idea,” says Paul Lett, of the National Institute of Standards and Technology in GaithersburgLett, “Now we have to see whether or not it will lead to something practical, or will remain just a clever demonstration of quantum mechanics.”(CreditBarreto-Lemos, Vergano) via
The Borexino neutrino detector uses a sphere filled with liquid scintillator that emits light when excited. This inner vessel is surrounded by layers of shielding and by about 2,000 photomultiplier tubes to detect the light flashes.(Credit: Borexino Collaboration) via
MOLECULAR MODEL In the molecular model, quark-antiquark pairs form two color-neutral mesons that become weakly linked as a molecule.
DIQUARK MODEL The particles form quark-quark and antiquark-antiquark pairs, which are forced to combine to balance their color charges. via
A computer model shows one scenario for how light is spread through the early universe on vast scales (more than 50 million light years across). Astronomers will soon know whether or not these kinds of computer models give an accurate portrayal of light in the real cosmos. (Credit: Andrew Pontzen/Fabio Governato) via
Radio/optical composite of the Orion Molecular Cloud Complex showing the OMC-2/3 star-forming filament. GBT data is shown in orange. Uncommonly large dust grains there may kick-start planet formation. (Credit: S. Schnee, et al.; B. Saxton, B. Kent (NRAO/AUI/NSF) via
In one potential method to realize superabsorption, a superabsorbing ring absorbs incident photons, giving rise to excitons. (Credit: Higgins, et al.) via phys.org
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