Changes

[[File:Cygnusx1.jpg|right|200px|thumb|Jet-powered nebula formed from the accretion disk of the binary star Cygnus-X1]]

[[File:Cygnusx1.jpg|right|200px|thumb|Jet-powered nebula formed from the accretion disk of the binary star Cygnus-X1]]

However, neither Schwarzschild himself nor [[Albert Einstein]], who developed the theory of relativity, believed that black holes actually existed.<ref name="amazing-space.stsci.edu"/>  Einstein even tried to re-work general relativity to render these [[Singularity|singularities]] impossible.  However, Roger Penrose and Stephen Hawking proved the first of many Singularity Theorems, which states that singularities must form if certain conditions are present. This demonstrated that, rather than mathematical oddities, singularities are a fairly generic consequence of realistic solutions to relativity:  any mass with radius less than its Schwarzschild radius is a black hole.  Since then, support for black holes among the scientific community has grown.

However, neither Schwarzschild himself nor [[Albert Einstein]], who developed the theory of relativity, believed that black holes actually existed.<ref name="amazing-space.stsci.edu">http://amazing-space.stsci.edu/resources/explorations/blackholes/lesson/whatisit/history.html</ref>  Einstein even tried to re-work general relativity to render these [[Singularity|singularities]] impossible.  However, Roger Penrose and Stephen Hawking proved the first of many Singularity Theorems, which states that singularities must form if certain conditions are present. This demonstrated that, rather than mathematical oddities, singularities are a fairly generic consequence of realistic solutions to relativity:  any mass with radius less than its Schwarzschild radius is a black hole.  Since then, support for black holes among the scientific community has grown.

==Nature of a Black Hole==

==Nature of a Black Hole==