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View Full Version : Telling black holes from neutron stars



ToSeek
2003-Apr-01, 05:19 PM
X-ray effect reveals black hole's event horizon (http://www.newscientist.com/news/news.jsp?id=ns99993573)

Time was, it was hard to figure out if something was a black hole or not. But astronomers seem to be coming up with more and more ways of doing so.