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2012, Saturday, 8. April 2006, 06:07
Quasar / Black Hole – without a surrounding galaxy?
Astronomers have observed what appears to be a quasar floating all by its lonesome in space. If confirmed, it would be the first instance of a quasar – and therefore a black hole – without a surrounding galaxy.
Quasars are extremely bright light emissions from super-massive black holes, caused when gas is drawn in by a hole’s enormous gravity. The process heats the gas to extreme temperatures, creating brilliance observable from Earth.
The new discovery raises questions about whether super-massive black holes could form before galaxies and whether a halo of dark matter around a black hole could spark a quasar. |
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