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Biggest void in space is 1 billion light years across - space - 24 August 2007 - New Scientist Space



 
 
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Old August 24th 07, 08:07 PM posted to uk.sci.astronomy
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Default Biggest void in space is 1 billion light years across - space - 24 August 2007 - New Scientist Space

· 17:23 24 August 2007
· NewScientist.com news service

Radio astronomers have found the biggest hole ever seen in the
universe. The void, which is nearly a billion light years across, is
empty of both normal matter and dark matter. The finding challenges
theories of large-scale structure formation in the universe.

Lawrence Rudnick and colleagues of the University of Minnesota in
Minneapolis, US, stumbled upon the void by accident. Rudnick's team
had been studying data from a survey carried out by the Very Large
Array radio telescope in New Mexico, also in the US. "One morning I
was a little bored, and said, 'why don't I look in the direction of
the WMAP cold spot'," says Rudnick.

The cold spot in question is an unexplained anomaly in the map of the
cosmic microwave background (CMB) created by NASA's WMAP satellite.
The photons of the CMB coming from a region of the sky in the
direction of the constellation Eridanus are colder than expected.

Much more at http://space.newscientist.com/article.ns?id=dn12546

 




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