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News About Stellar Chemistry
April 29, 2016
Superfast light source made from artificial atom
Copenhagen, Denmark (SPX) Apr 29, 2016
All light sources work by absorbing energy - for example, from an electric current - and emit energy as light. But the energy can also be lost as heat and it is therefore important that the light sources emit the light as quickly as possible, before the energy is lost as heat. Superfast light sources can be used, for example, in laser lights, LED lights and in single-photon light sources for quantum technology. New research results from the Niels Bohr Institute show that light sources can be made ... read more

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Dark matter does not contain certain axion-like particles
Researchers at Stockholm University are getting closer to corner light dark-matter particle models. Observations can rule out some axion-like particles in the quest for the content of dark matter. T ... more
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Cosmic beacons reveal the Milky Way's ancient core
An international team of astronomers led by Dr. Andrea Kunder of the Leibniz Institute for Astrophysics Potsdam (AIP) in Germany has discovered that the central 2,000 light-years within the Milky Wa ... more
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Herschel captures galactic panorama of the Milky Way
This new video from ESA's Herschel space observatory reveals in stunning detail the intricate pattern of gas, dust and star-forming hubs along the plane of our Galaxy, the Milky Way. Against t ... more
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Microscopic 'clocks' time distance to source of galactic cosmic rays
Most of the cosmic rays arriving at Earth from our galaxy come from nearby clusters of massive stars, according to new observations from the Cosmic Ray Isotope Spectrometer (CRIS), an instrument abo ... more
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Microscopic 'timers' reveal likely source of galactic space radiation
Most of the cosmic rays that we detect at Earth originated relatively recently in nearby clusters of massive stars, according to new results from NASA's Advanced Composition Explorer (ACE) spacecraf ... more
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Nearby supernova ashes continue to rain on Earth
Traces of 60Fe detected in space indicate that a nearby supernova occurred within the last few million years. The iron isotope 60Fe, which is very rare, is created when a massive star collapses in t ... more
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Probing the transforming world of neutrinos
Every second, trillions of neutrinos travel through your body unnoticed. Neutrinos are among the most abundant particles in the universe, but they are difficult to study because they very rarely int ... more
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A Space Spider Watches Over Young Stars
A nebula known as "the Spider" glows fluorescent green in an infrared image from NASA's Spitzer Space Telescope and the Two Micron All Sky Survey (2MASS). The Spider, officially named IC 417, lies n ... more
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HAWC Gamma-Ray Observatory's reveals the very-high-energy sky
The United States and Mexico constructed the High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory to observe some of the most energetic phenomena in the known universe - the aftermath when mas ... more
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Inside the fiery furnace
Galaxies, it seems, are sociable animals and they like to gather together in large groups, known as clusters. Actually it's gravity that holds the galaxies in the cluster close together as a single ... more
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New hypervelocity binary star challenges dark matter, stellar acceleration models
A team of astronomers at the Friedrich Alexander University led by Peter Nemeth has discovered a binary star moving nearly at the escape velocity of our galaxy. There are about two dozen so-called h ... more
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Calcium isotope holds the secret to the mass of neutrinos
Scientists around the world are being kept in suspense by the negligible mass of neutrinos, subatomic particles that could be matter and antimatter at the same time. Now, researchers from the Univer ... more
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Hidden galaxy found in ALMA gravitational lens image
Researchers have uncovered the existence of a dwarf "dark galaxy" lurking nearly 4 billion light-years away from Earth. The discovery was made when a team of researchers, including astronomers at th ... more
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Are cosmic rays the key to galaxy formation
The new Junior Research Group "High Energy Astrophysics and Cosmology" (HAC) has now started at the Heidelberg Institute for Theoretical Studies (HITS). HITS astrophysicist Dr. Christoph Pfrommer ha ... more
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The Missing Brown Dwarfs
When re-analysing catalogued and updated observational data of brown dwarfs in the solar neighbourhood, astronomers from Potsdam have found that a significant number of nearby brown dwarfs should st ... more
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How to reach Alpha Centauri in just 20 years
Billionaire Russian investor Yuri Milner and British cosmologist Stephen Hawking on Tuesday announced an ambitious new space initiative for a mission to Alpha Centauri, the nearest star system to Earth. ... more
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An Oasis in the brown dwarf desert - astronomers surprised, relieved
A new paper published this month in The Astronomical Journal by astronomers from the Sloan Digital Sky Survey (SDSS) reports a wellspring of new brown dwarf stellar companions, throwing cold water o ... more
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Physicists discover rare brown dwarf, essential for testing theoretical models
A team led by Justin Crepp, the Frank M. Freimann Assistant Professor of Physics at the University of Notre Dame, has discovered a rare brown dwarf, a faint object with properties in between that of ... more
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NASA celebrates 25 years of breakthrough gamma-ray science
Twenty-five years ago this week, NASA launched the Compton Gamma Ray Observatory, an astronomical satellite that transformed our knowledge of the high-energy sky. Over its nine-year lifetime, Compto ... more
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Proof that ancient supernovae zapped Earth sparks hunt for after effects
Two new papers appearing in the journal Nature this week are "slam-dunk" evidence that energies from supernovae have buffeted our planet, according to astrophysicist Adrian Melott of the University ... more
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RadioAstron Observations of the Extremely Hot Heart of Quasar 3C 273
The space mission RadioAstron employing a 10-meter radio telescope on board of the Russian satellite Spektr-R has revealed the first look at the finest structure of the radio emitting regions in the ... more
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Andromeda's first spinning neutron star
Decades of searching in the Milky Way's nearby 'twin' galaxy Andromeda have finally paid off, with the discovery of an elusive breed of stellar corpse, a neutron star, by ESA's XMM-Newton space tele ... more
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Hubble's journey to the center of our galaxy
Peering deep into the heart of our Milky Way galaxy, NASA's Hubble Space Telescope reveals a rich tapestry of more than half a million stars. Except for a few blue foreground stars, the stars are pa ... more
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Researchers demonstrate a new way to characterize twisted light
Researchers at the University of Rochester have overcome experimental challenges to demonstrate a new way for getting a full picture of twisted light: characterizing the Wigner distribution. T ... more
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