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Dark matter search turns up empty

New calculations suggest dearth of invisible substance in solar neighborhood

4:08pm, April 20, 2012

Scientists using Earth-based experiments to detect particles of dark matter might now know why they keep coming up empty-handed: There may be no dark matter in the solar neighborhood — at least, not within 13,000 light-years, reports a study appearing in an upcoming issue of the Astrophysical Journal.

Though dark matter, a mysterious substance different from ordinary, visible matter, supposedly makes up more than 80 percent of the matter in the universe, the new work suggests that the solar system lives in a dark matter desert. That’s a problem, because most scientists think the Milky Way galaxy is emb

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