"It is certainly possible that known astrophysical objects, such as nearby supernova remnants, spinning pulsars or, possibly, microquasars are responsible," said Yousaf Butt, with the Harvard-Smithsonian Center for Astrophysics. Goodman and his colleagues made their discovery with the Milagro Gamma Ray Observatory, which is located in a covered pond, about the size of a football field, in the Jemez Mountains near Los Alamos, N.M. The observatory detects highly energized particles striking the atmosphere by measuring the cascading effects on secondary particles that make it to the planet's surface. Since the study began more than seven years ago, Milagro -- Spanish for "miracle" -- has detected more than 300 billion hits. Goodman's work was published last month in Physical Review Letters. Related Links: Irene Klotz's blog: Free Space |
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