Monday, February 05, 2007

COSMIC REVELATION

Astronomers unveil detailed 3-D map of universe

A team of astronomers has unveiled a three-dimensional map that sheds light on the mysterious dark matter that makes up a quarter of the universe. The map shows that the dark matter forms a filamentous skeleton upon which visible matter congregates, eventually producing stars, Nature magazine has reported. The composition of the dark matter is unclear but it is believed that without it the universe could not exist. The dark matter is thought to act as glue, holding galaxies together. ‘This is the first time that such a large scale three-dimensional picture of dark matter has been produced, and it will allow cosmologists to probe deeper into the nature of this elusive matter”, the report said.

The map also has a few puzzles within it. Some areas show clumps of dark matter that aren’t accompanied by the bright features associated with conventional visible material (made of Baryonic matter) and vice versa.

“On the large scale, the general picture is as expected, but there are some small-scale discrepancies”, it was reported, based on the map synthesized from hundreds of slightly overlapping images from the Hubble space telescope’s cosmic evolution survey.

“The existence of large clumps of isolated dark matter and visible matter flies in the face of everything we know”, according to a cosmologist from the University of Durham, U.K.
srini

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