Changes

===Inside the Event Horizon===

===Inside the Event Horizon===

What actually exists inside the event horizon of a black hole is a question physics is unable to answer. Some postulate that within the event horizon exists a point of zero (or nearly zero) volume but infinite energy density, a point sometimes referred to as a ''gravitational singularity,'' after the notion of a mathematical singularity (a term equaling infinity) in a field equation. Others suspect that infinite energy density is a physical impossibility, and that a black hole contains actual finitely-dense matter compressed into a [[degenerate matter|degenerate]] form, such as quark-degenerate matter. Since all black holes are surrounded by an event horizon which prevents any information or messages from leaving, all these theories are non-[[falsifiable]]; we can never be sure what the interior structure of a black hole is like.

What actually exists inside the event horizon of a black hole is a question that illuminates the divergence of quantum mechanics and classical mechanics. Some postulate that within the event horizon exists a point of zero (or nearly zero) volume but infinite energy density, a point sometimes referred to as a ''gravitational singularity,'' after the notion of a mathematical singularity (a term equaling infinity) in a field equation. Others suspect that infinite energy density is a physical impossibility, and that a black hole contains actual finitely-dense matter compressed into a [[degenerate matter|degenerate]] form, such as quark-degenerate matter. Classical theory suggests that since the black hole loses much of it's complexity in formation, information is lost, and as a result, maintains only mass, angular momentum, and charge.  Quantum theory, however, predicts that complextiy, and therefore, information, cannot be lost.  This suggests the unproven existence of "Hawking radiation", which would be very small magnitude and difficult to detect.

 

===Properties of Black Holes===

===Properties of Black Holes===