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Stardust

by a21cent @ Thursday, 01. Nov, 2007 - 02:41:39 pm

No, not the film ;-)

The building blocks of planets and people come from black holes

WHEN the writer of Genesis said man was made of dust, he spoke true. And not just man. The whole Earth was made from dust particles in orbit around the primitive sun, as were all the other solid objects in the solar system. But how did the dust itself come into existence?

That is a puzzle. Modern space dust blows off stars that formed about 10 billion years ago. These stars would have been too young to have shed much of the stuff by the time that the solar system formed, 4.5 billion years ago. The universe's primordial dust must therefore have come from somewhere else—and a team of researchers led by Ciska Markwick-Kemper of the University of Manchester think they know where. The answer is from black holes.

Full article here:
http://www.economist.com/science/displaystory.cfm?story_id=9942036


 
 

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