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Saturday, September 22, 2007

Parallel Universes Make Sense - Welcome to the Multiverse

If you think of yourself as unique, think again. The days when physicists could ignore the concept of parallel universes may have come to an end. If that doesn't send a shudder down your spine, think of it this way: our world is just one of many. You are just one version of many.
David Deutsch at the University of Oxford and colleagues have shown that key equations of quantum mechanics arise from the mathematics of parallel universes. "This work will go down as one of the most important developments in the history of science," says Andy Albrecht, a physicist at the University of California at Davis. In one parallel universe, at least, it will - whether it does in our one remains to be seen.
You can read the theory from David Deutsch by clicking here.
Soon-to-be-discovered: The theory of the structure of the multiverse under quantum gravity.
This was seized 4 u at New Scientist
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Monday, August 06, 2007

Largest merger of galaxies discovered

Four massive galaxies are colliding in the largest galactic merger ever seen, new observations reveal. The smash-up is shedding light on how the biggest galaxies in the universe form – and why many of them stopped giving birth to stars billions of years ago. Astronomers classify mergers according to the relative sizes of the galaxies involved. Minor mergers unite galaxies of vastly different size – marrying a 'dwarf' galaxy with one the size of the Milky Way, for example – while major mergers join those of roughly equal size.
Now, researchers led by Kenneth Rines of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, US, have found the largest major merger ever seen. It involves a quartet of galaxies at the centre of a galactic cluster known as CL0958+4702, which lies about 5 billion light years from Earth. Three of the merging galaxies are the size of the Milky Way, while the other is about three times as massive. "This is the largest major merger in terms of total stellar mass. Read more...
This was seized 4 u at New Scientist
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