Science

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The Solar System’s grandest canyon

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Valles Marineris, seen at an angle of 45 degrees to the surface in near-true colour and with four times vertical exaggeration. The image covers an area of 630 000 sq km with a ground resolution of 100 m per pixel. The digital terrain model was created from 20 individual HRSC orbits, and the colour data were generated from 12 orbit swaths. The largest portion of the canyon, which spans right across the image, is known as Melas Chasma. Candor Chasma is the connecting trough immediately to the north, with the small trough Ophir Chasma beyond. Hebes Chasma can be seen in the far top left of the image.

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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.