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A brown dwarf joins the jet-set
05-23-2007 · EurekAlert!Jets of matter have been discovered around a very low mass "failed star," mimicking a process seen in young stars. This suggests that these "brown dwarfs" form in a similar manner to normal stars but also thatoutflows are driven out by objects as massive as hundreds of millions of solar masses down to Jupiter-sized objects.
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- Neutron stars join the black hole jet set
06-27-2007 · EurekAlert!
NASA's Chandra X-ray Observatory has revealed an X-ray jet blasting away from a neutron star in a binary system. This discovery may help astronomers understand how neutron stars as well as black holes can generate powerful beams of relativistic particles.
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- The star, the dwarf and the planet
10-19-2006 · EurekAlert!
Astronomers have detected a new faint companion to the star HD 3651, already known to host a planet. This companion, a brown dwarf, is the faintest known companion of an exoplanet host star imaged directly and one of the faintest T dwarfs detected in the Solar neighbourhood so far. The detection yields important information on the conditions under which planets form.
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- UCLA's Christopher Russell leads NASA's Dawn Mission, set for July 7 launch
06-26-2007 · EurekAlert!
Christopher Russell, UCLA professor of geophysics and space physics, is principal investigator on NASA's Dawn mission to the doughnut-shaped asteroid belt between Mars and Jupiter. Dawn is scheduled to launch July 7 from Cape Canaveral. Dawn will conduct a detailed study of the structure and composition of two of the first bodies formed in our solar system: the "dwarf planet" Ceres and the massive asteroid Vesta.
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- Jet Set: Astronomers identify the makeup of quasar streams
10-70-2006 · Science News Online
Astronomers have identified the particles in jets emanating from supermassive black holes as electrons and protons, which carry much more energy than some computer models had suggested.
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- The gobbling dwarf that exploded
07-13-2007 · EurekAlert!
A unique set of observations, obtained with ESO's VLT, has allowed astronomers to find direct evidence for the material that surrounded a star before it exploded as a Type Ia supernova. This strongly supports the scenario in which the explosion occurred in a system where a white dwarf is fed by a red giant.
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- XO-3b: Supersized planet or oasis in the 'brown dwarf desert'?
05-30-2007 · EurekAlert!
One of the oddest extrasolar planets ever cataloged -- a mammoth orb more than 13 times the mass of Jupiter that orbits its star in less than four days -- will be unveiled at the American Astronomical Society meeting in Honolulu.
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- Student joins AMASE expedition in Svalbard
08-15-2007 · European Space Agency (ESA)
For two weeks, an international crew of scientists and engineers are field-testing instruments for future Mars missions. Thea Falkenberg, winner of a student contest to join the AMASE expedition, reports back on her experiences through a daily blog.
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- 'Cooper pairs' can be found in insulators as well superconductors
11-22-2007 · EurekAlert!
Fifty years ago, three physicists unveiled their BCS theory of superconductivity, which explained how currents of electrons can flow perpetually if they join in pairs. Those physicists, including Leon Cooper at Brown University, won a Nobel Prize for their work. Now Brown physicists have shown something surprising: the formation of Cooper pairs can not only help electric current to flow but it can also block that current. Their research appears in Science.
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12-06-2006 · EurekAlert!
Mobile DNA, which inserts foreign genes into target cells, is a powerful force in the march of evolution and the spread of disease. Working with the lambda virus and E. coli bacteria, Brown University biologists have solved the structure of a six-protein complex critical to performing this gene-grafting surgery. The technique they developed could be used to reveal the structure of other critical protein complexes, landing the work on the cover of Molecular Cell.
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- Migration played key role in HIV spread in South Africa
02-13-2007 · EurekAlert!
South Africa has one of the world’s highest rates of HIV infection. New research, led by Brown University professor Mark Lurie, shows that the movement of workers between urban and rural areas played a key role in the spread of the epidemic. Results are published in AIDS.
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