Science

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Newly Named Sunspot AR1598 Releases M5 Class Solar Flare

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This image of a solar flare on Oct 22, 2012, combines the light from two different wavelengths as captured by NASA’s Solar Dynamics Observatory (SDO). The wavelengths are 131 and 335 Angstroms, typically colorized in teal and blue, respectively. The former is a particularly good wavelength for observing solar flares, while the latter helps highlight active regions on the sun where such flares can originate.

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So you want to segregate your nanoparticles?

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A novel scheme to enhance local electric fields around metal nanostructures

Enhanced local electric fields are predominant in nonlinear optical properties, particularly in surface-enhanced Raman scattering (SERS), which is a sensitive technique used for the detection of trace amounts of chemicals.

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Hubble Sees Galaxy in a spin

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The image is a combination of exposures taken in visible and near-infrared light, using Hubble’s Advanced Camera for Surveys. The field of view is around 3.4 by 3.4 arcminutes, or around a tenth of the diameter of the full moon.

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Keck confirms: Armchair astronomers find planet in four-star system

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An artist's illustration of PH1, a planet discovered by volunteers from the Planet Hunters citizen science project. PH1, shown in the foreground, is a circumbinary planet and orbits two suns.

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Single-Crystal, Organic Nanowire High-Performance Phototransistors

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Growing graphene better for future electronics

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New cobalt-graphene catalyst could challenge platinum for use in fuel cells: Performs nearly as well as precious metal catalysts

There's a new contender in the race to find an inexpensive alternative to platinum catalysts for use in hydrogen fuel cells.

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Nanoparticles of cobalt attach themselves to a graphene substrate in a single layer. As a catalyst, the cobalt-graphene combination was a little slower getting the oxygen reduction reaction going, but it reduced oxygen faster and lasted longer than platinum-based catalysts.

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Jupiter: Turmoil from Below, Battering from Above

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Images in the visible-light and infrared parts of the spectrum highlight the massive changes roiling the atmosphere of Jupiter.

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Radioactive decay of titanium powers supernova remnant

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Supernova remnant SNR1987A is located 166 000 light-years away in the Large Magellanic Cloud. The light from the stellar explosion arrived at Earth in 1987, and has since provided astronomers with a natural laboratory to monitor how the brightness of a supernova changes over time.
Dominating this Hubble Space Telescope view of the remnant are two glowing loops and a very bright ring of shocked hotspots surrounding the location of the now-exploded central star. The material making up these loops and rings was probably ejected from the star earlier in its history and is now being illuminated by the supernova and its shockwave.