Thursday 17 March 2016

Capturing 'black gold' with light

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New research has found a simple and effective way of capturing graphenes and the toxins and contaminants they attract from water by using light. The findings could have significant implications for large-scale water purification.
via Science Daily

Student-built dust counter got few 'hits' on Pluto flyby

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A student-built instrument riding on NASA's New Horizons spacecraft found only a handful of dust grains, the building blocks of planets, when it whipped by Pluto at 31,000 miles per hour last July.
via Science Daily
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Pluto and Its Moons

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Pluto’s four smaller moons — Nix, Hydra, Styx and Kerberos — are brighter and smaller than astronomers had expected, as revealed by NASA’s New Horizons spacecraft.










via New York Times

A source accelerating Galactic cosmic rays to unprecedented energy discovered at the center of the Milky Way

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For more than ten years the H.E.S.S. observatory in Namibia, run by an international collaboration of 42 institutions in 12 countries, has been mapping the center of our galaxy in very-high-energy gamma rays. These gamma rays are produced by cosmic rays from the innermost region of the Galaxy. A detailed analysis of the latest H.E.S.S. data reveals for the first time a source of this cosmic radiation at energies never observed before in the Milky Way: the supermassive black hole at the center of the Galaxy, likely to accelerate cosmic rays to energies 100 times larger than those achieved at the largest terrestrial particle accelerator
via Science Daily
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Monster stars

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Hubble has identified dozens of very massive stars in a stellar cluster, including nine over 100 times more massive than the Sun
via ESA Space Science
http://sci.esa.int/hubble/57627

Hubble unveils monster stars

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Astronomers using the unique ultraviolet capabilities of the NASA/ESA Hubble Space Telescope have identified nine monster stars with masses over 100 times the mass of the Sun in the star cluster R136. This makes it the largest sample of very massive stars identified to date. The results raise many new questions about the formation of massive stars.
via Science Daily
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Hubble Unveils Monster Stars


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An international team of astronomers using the ultraviolet capabilities of NASA's Hubble Space Telescope has identified nine monster stars with masses over 100 times the mass of the sun in the star cluster R136. This makes for the largest sample of very massive stars identified to date. The results, which will be published in the Monthly Notices of the Royal Astronomical Society, raise many new questions about the formation of massive stars. R136 is only a few light-years across and is located in the Tarantula Nebula within the Large Magellanic Cloud, about 170,000 light-years away from Earth. The young cluster hosts many extremely massive, hot, and luminous stars whose energy is mostly radiated in the ultraviolet.


via HubbleSite NewsCenter -- Latest News Releases
http://hubblesite.org/newscenter/archive/releases/2016/10/

Close Comet and Large Magellanic Cloud

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Sporting a surprisingly bright, lovely green coma Comet 252P/Linear poses next to the Large Magellanic Cloud in this southern skyscape. The stack of telephoto exposures was captured on March 16 from Penwortham, South Australia. Recognized as a Jupiter family periodic comet, 252P/Linear will come close to our fair planet on March 21, passing a mere 5.3 million kilometers away. That's about 14 times the Earth-Moon distance. In fact, it is one of two comets that will make remarkably close approaches in the next few days as a much fainter Comet Pan-STARRS (P/2016 BA14) comes within 3.5 million kilometers (9 times the Earth-Moon distance) on March 22. The two have extremely similar orbits, suggesting they may have originally been part of the same comet. Sweeping quickly across the sky because of their proximity to Earth, both comets will soon move into northern skies.

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