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Wed, 18 Feb 2009 Where killer asteroids congregate? Later this year, NASA will send spacecraft to explore two strange regions of space, where the gravity fields of our planet and the sun cancel out. They are the belly buttons of the solar system, trapping rocky debris that falls into them - and that may make them reservoirs of killer asteroids. more at http://www.newscientist.com/article/mg20126962.000-do-gravity-holes-harbour-planetary-assassins.html?DCMP=NLC-nletter&nsref=mg20126962.000 [] permanent link