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Controlled by distant explosions

A time-series of high-resolution spectra in the optical and ultraviolet has twice been obtained just a few minutes after the detection of a gamma-ray bust explosion in a distant galaxy. The international team of astronomers responsible for these observations derived new conclusive evidence about the nature of the surroundings of these powerful explosions linked to the death of massive stars.

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Keywords: controlled, distant, explosions, explosion

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1. Mystery cosmic explosions
   12-20-2006 · EurekAlert!
   Scientists have discovered what appears to be a new kind of cosmic explosion, the subject of four articles in this week's issue of Nature. They call the explosion a hybrid gamma-ray burst.As with other gamma-ray bursts, this hybrid burst is likely signalling the birth of a new black hole. It is unclear, however, what kind of object or objects exploded or merged to create the black hole or, perhaps, something even more bizarre.
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2. NASA and Gemini probe mysterious explosion in the distant past
   01-08-2008 · EurekAlert!
   Using the powerful one-two combo of NASA's Swift satellite and the Gemini Observatory, astronomers have detected a mysterious type of cosmic explosion farther back in time than ever before. The explosion, known as a short gamma-ray burst, took place 7.4 billion years ago, more than halfway back to the Big Bang.
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3. Double-star systems cycle between big and small blasts
   03-07-2007 · EurekAlert!
   Certain double, or binary, star systems erupt in full-blown explosions and then flare up with smaller bursts, according to new information gathered by NASA’s Galaxy Evolution Explorer (GALEX) and analyzed by a team of astronomers, including postdoctoral researcher Mark Seibert of the Carnegie Observatories. The data bolster a 20-year-old theory suggesting that double star systems experience both explosion types, rather than just one or the other.
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4. NASA's Chandra sees brightest supernova ever
   05-07-2007 · EurekAlert!
   The brightest stellar explosion ever recorded may be a long-sought new type of supernova, according to observations by NASA's Chandra X-ray Observatory and ground-based optical telescopes. This discovery indicates that violent explosions of extremely massive stars were relatively common in the early universe, and that a similar explosion may be ready to go off in our own Galaxy.
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5. Double explosion heralds the death of a very massive star
   06-13-2007 · EurekAlert!
   A unique discovery of two celestial explosions at exactly the same position in the sky has led astronomers to suggest they have witnessed the death of one of the most massive stars that can exist. A global collaboration of astronomers, led by Queen's University Belfast teamed up with Japanese supernova hunter Koichi Itagaki to report an amazing new discovery in Nature this week.
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6. Asymmetric ashes
   11-30-2006 · EurekAlert!
   Astronomers are reporting remarkable new findings that shed light on a decade-long debate about one kind of supernovae, the explosions that mark a star's final demise: Does the star die in a slow burn or with a fast bang? From their observations, the scientists find that the matter ejected by the explosion shows significant peripheral asymmetry but a nearly spherical interior, most likely implying that the explosion finally propagates at supersonic speed.
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7. Major Advance In The Fight Against Chronic Virus Infections
   10-11-2006 · ScienceDaily
   A major finding that could lead to a new approach for treating hepatitis C and other chronic virus infections was announced today by researchers at the La Jolla Institute for Allergy and Immunology. The research team, using controlled laboratory studies of mice, was able to eliminate a chronic virus infection in the animals by blocking a key messenger molecule in the immune system. The finding has particular relevance for hepatitis C, but may also be applicable to AIDS, cytomegalovirus and other chronic virus infections.
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8. Scientists uncover speedometer for crystal growth controlled by biomolecule properties
   12-04-2006 · EurekAlert!
   Researchers at Virginia Tech, Lawrence Livermore National Laboratory and the Children's Hospital of Philadelphia report that the chemistry of organic molecules control the rate of crystal growth. Nano-quantities of biomolecules in the tissues of organisms where biominerals develop can cause calcite crystals to grow faster. And speed of growth can be tuned by varying the charge and water-structuring ability of the biomolecules. The findings result in a speedometer that predicts the type of molecules that will speed up crystal growth.
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9. Manipulating nature: Scientists query wildlife birth-control method
   02-11-2007 · EurekAlert!
   Australian scientists are raising concerns over the unpredictable nature of a contraceptive vaccine that aims to control populations of wild animals, such as rabbits and foxes.Writing in the latest issue of the journal, Reproduction, UNSW genetics expert Professor Des Cooper warns that the immuno-contraception method is not fully effective and is manipulating natural reproduction in ways that can't be predicted or controlled.
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10. Enzymes release caged chemicals
    04-14-2007 · Science News Online
    A new controlled-release technology relies on enzymes to unshackle a chemical only when and where it's needed.
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