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ScienceCasts: 600 Mysteries in the Night Sky

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Uploaded on Oct 14, 2011

Visit http://science.nasa.gov/science-news/... for the full story.

The Fermi Gamma-ray Space Telescope recently produced a map of the night sky. Out of 1873 new sources, nearly 600 were complete mysteries. In this week's ScienceCast, researchers speculate on the nature of the mystery objects - including the possibility that they are made of dark matter.

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