Supernova produces cosmic rays
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Astronomers claim to have found the first firm evidence that cosmic rays can come from stars that have exploded, or supernova remnants.
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NASA&#39;s Galaxy Evolution Explorer has discovered larger and younger than expected galaxies. The NASA craft found three dozen galaxies emitting ultraviolet light at levels that would indicate supernovas are still exploding.
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Duke University -- A Supernova Early Warning System (SNEWS) that detects ghostlike neutrino particles that are the earliest emanations from the immense, explosive death throes of large stars will alert astronomers of the blasts before they can see the flash.     SNEWS "could allow astronomers a chance to make unprecedented observations of the very early turn-on of the supernova," wrote the authors of an article about the new system in the September issue of the "New Journal of Physics."     They also noted that "no supernova has ever been observed soon after its birth."     Big stars end their lives in explosive gravitational collapses so complete that even the brilliant flashes of light usually announcing these extremely rare "supernova" events stay trapped inside, unseen by astronomers, for the first hours or days...
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Three powerful bursts of energy from different regions of space could presage    spectacular explosions of huge stars, astronomers just announced.
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Scientists have now officially witnessed the perfect cosmic storm. Thanks to the European Space Agency's XMM-Newton observatory, they watched a nearby head-on collision between two galaxy clusters. The clusters smashed together thousands of galaxies and trillions of stars in one of the most powerful events ever witnessed.
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A powerful jet of particles from a supermassive black hole is seen blasting a nearby galaxy.
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A new space observatory has been launched to hunt down and study the most powerful explosions seen in the Universe since the Big Bang itself.
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An international team of astronomers believe they have solved a mystery that has been perplexing scientists for 100 years -- the origin of cosmic rays.
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Astronomers are closely watching three sections of the sky after detecting three short but powerful X-ray bursts that may be harbingers of supernovas that could happen in the next few days.
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Three powerful blasts from three wholly different regions in space have left scientists scrambling. The blasts, which lasted only a few seconds, might be early alert systems for star explosions called supernovae, which could start appearing any day now.
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The mysterious origins of cosmic rays that slam into the Earth's atmosphere could soon be revealed, thanks to a better ground-based sensor that costs less than balloons or satellites.
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The energy created when black holes merge contributes to star formation while&nbsp;blowing gas to the outskirts of a galaxy, this creates&nbsp;a limit as to how much the black hole can consume, a new computer simulation shows.
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Every day, somewhere in the universe, there&#39;s an explosion that puts the power of the Sun in the shade. Steve Connor investigates the riddle of gamma-ray bursts.
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A team of astronomers from France and South Africa announced the first catalog of a new type of gamma-ray source, a dozen clouds of ârelicâ radiation from dead stars that reveal information about the energetic past of these celestial objects. These findings were presented on Feb.
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Today, February 24th, is the 20th anniversary of the discovery of Supernova 1987A (SN1987A), the most famous supernova of our time.
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A NASA satellite catches the action as a massive star smashes to smithereens. It open up a whole new universe to astronomers. By Kristen Philipkoski.
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A massive black hole at the heart of a galaxy is emitting a powerful stream of radiation that is destroying everything in its path, including another galaxy