Massive Merger of Galaxies is the Most Powerful on Record
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Scientists have now officially witnessed the perfect cosmic storm. Thanks to the European Space Agency&#39;s XMM-Newton observatory, they watched a nearby head-on collision between two galaxy clusters.
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A powerful jet from a supermassive black hole is blasting a nearby galaxy and possibly causing profound problems for planets in the jet's path.
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The explosive death of a massive star has broken the record for longest-lived light show. Observations from NASA's Swift satellite have revealed a so-called gamma-ray burst for which the afterglow remained visible for more than 125 days.
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SAN DIEGO - For decades, astronomers have sought to pin down a source for ultra high-energy cosmic rays. The distant sources must be among the more powerful events in the universe, perhaps the creation of black holes or the mergers of galaxies.
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Scientists said on Wednesday that   they have found the most distant galaxy yet, nearly 13 billion   light-years away, in a discovery that could help explain how   stars were formed at the dawn of time.
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Astronomers use the Hubble telescope to reveal the effects of unseen dark matter as it tugs on galaxies in a crowded supercluster.
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Astronomers using a giant telescope say  they have found glimpses of the most distant -- and oldest --  galaxies ever seen, a finding that will help provide clues to  the origins of the universe.
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Astronomers took pictures of a far-off lumpy galaxy just forming 13 billion years ago, putting it among the earliest and most distant cosmic objects ever photographed.
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An international team of scientists described this week one of the most cataclysmic events in the universe, cosmic cannibalism in which one massive galaxy cluster is gobbling its smaller neighbor.
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Scientists see a galaxy whose light would have set out some 12.8 billion years ago.
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A giant hydrogen gas cloud will create new stars when it hits our galaxy in 20-40 million years' time.
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Supercomputed big bang Scientists have a better understanding of the role black holes have played in the evolution of galaxies in our cosmos, thanks to a new and unprecedentedly detailed simulation of the universe developed by researchers from Carnegie Mellon University.â¦
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Astronomers using NASA's Chandra X-ray Observatory have discovered one of the fastest stars ever seen--a &quot;cosmic cannonball&quot; that is challenging theories to explain its blistering speed.
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Astronomers identify an enormous void in space that measures nearly a billion light-years across.
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A team of astronomers from the US and the UK obtain some of the clearest pictures of space ever taken.
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A Finnish team describes a black hole that is a record 18 billion times more massive than our own Sun.
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Astronomers think they have found a rare if not unique black hole very near the center of the Milky Way. That would make two of the beasts in that part of the galaxy.