NASA Performs Headcount of Local Black Holes

NASA scientists using the Swift satellite have conducted the first complete census of galaxies with active, central black holes, a project that scanned the entire sky several times over a nine-month period.

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<p><a href="http://www.physorg.com/news79361695.html">NASA Performs Headcount of Local Black Holes</a></p> <p>NASA scientists using the Swift satellite have conducted the first complete census of galaxies with active, central black holes, a project that scanned the entire sky several times over a nine-month period.</p>