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Astronomers find record-old cosmic explosion
01-09-2008 · EurekAlert!Astronomers have detected a mysterious type of cosmic explosion, a short gamma ray burst, farther back in time than ever before: 7.4 billion years, more than halfway back to the Big Bang.
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Keywords: astronomers, record-old, cosmic, explosion, astronomer, record, old
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- 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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- Astronomers discover new kind of black-hole explosion
12-20-2006 · EurekAlert!
Scientists have discovered what appears to be a new kind of cosmic explosion -- a "hybrid gamma-ray burst" -- which will be the subject of four articles to be published in the journal Nature on 21 December 2006. The scientists include four astrophysicists at Penn State University as well as others around the globe. The nature of the explosion is a puzzle in "virtually uncharted territory" for space scientists.
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- The dark side of nature: The crime was almost perfect
12-20-2006 · EurekAlert!
Nature has again thrown astronomers for a loop. Just when they thought they understood how gamma-ray bursts formed, they have uncovered what appears to be evidence for a new kind of cosmic explosion. These seem to arise when a newly born black hole swallows most of the matter from its doomed parent star.
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- Solving a 400-year-old supernova riddle
01-27-2007 · Science News Online
Astronomers have determined that Kepler's supernova, the last stellar explosion witnessed in our galaxy, belongs to the class known as type 1a.
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- Intergalactic 'shot in the dark' shocks astronomers
12-18-2007 · EurekAlert!
A team of astronomers has discovered a cosmic explosion that seems to have come from the middle of nowhere -- thousands of light-years from the nearest galaxy-sized collection of stars, gas, and dust. This "shot in the dark" is surprising because the type of explosion, a long-duration gamma-ray burst, is thought to be powered by the death of a massive star.
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- 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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- Red dust in planet-forming disk may harbor precursors to life
01-03-2008 · EurekAlert!
Astronomers at the Carnegie Institution have found the first indications of highly complex organic molecules in the disk of red dust surrounding a distant star. The eight-million-year-old star, known as HR 4796A, is inferred to be in the late stages of planet formation, suggesting that the basic building blocks of life may be common in planetary systems.
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- 2 explosive evolutionary events shaped early history of multicellular life
01-03-2008 · EurekAlert!
Scientists have known for some time that most major groups of complex animals appeared in the fossils record during the Cambrian Explosion, a seemingly rapid evolutionary event that occurred 542 million years ago. Now Virginia Tech paleontologists, using rigorous analytical methods, have identified another explosive evolutionary event that occurred about 33 million years earlier among macroscopic life forms unrelated to the Cambrian animals.
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- Fossil discovery marks earliest record of limbloss in ancient lizard
03-22-2007 · EurekAlert!
It wouldn't have been the easiest way to get around. A University of Alberta paleontologist has helped discover the existence of a 95 million-year-old snakelike marine animal, a finding that provides not only the earliest example of limbloss in lizards but the first example of limbloss in an aquatic lizard.
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- Astronomers weigh 200-million-year-old baby galaxies
10-25-2006 · EurekAlert!
Astronomers have taken amazing pictures of two of the most distant galaxies ever seen. The ultradeep images, taken at infrared wavelengths, confirm for the first time that these celestial cherubs are real. The researchers are now able to weigh galaxies and determine their age at earlier times than ever before, providing important clues about the evolutionary origins of galaxies like our Milky Way.
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