Milky Way Mystery Means Dark Matter? Meh
Thursday, July 9, 2009 - 10:49
in Astronomy & Space
A team of astrophysicists say they have solved a mystery that led some scientists to speculate that the distribution of certain gamma rays in our Milky Way galaxy was evidence for undetectable 'dark matter' making up much of the mass of the universe. In two papers, the astrophysicists instead say that this distribution of gamma rays can be explained by the way "antimatter positrons" from the radioactive decay of elements, created by massive star explosions in the galaxy, propagate through the galaxy. Thus, they say, the observed distribution of gamma rays is not evidence for dark matter. read more
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