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No-Hair Theorem

Physicist John Wheeler once made a famous remark, "Black holes have no hair." This referred to the theory that there are only three parameters that can be applied by an outside observer relating to a black hole: mass, electric charge and angular momentum.

This is because in all solutions of the Einstein-Maxwell Equations in General Relativity, all other information about a black hole is hidden from observation by the event horizon. This means the No-Hair Theorem is essentially a restatement of the Cosmic Censorship Hypothesis.

Web Resources On No-Hair Theorem

Information Loss in Black Holes
No hair theorem (Wikipedia)

Book Resources On No-Hair Theorem

Science and Ultimate Reality: Quantum Theory, Cosmology, and Complexity by John Barrow, Paul Davies and Charles Harper, Jr., Eds.
The Future of Theoretical Physics and Cosmology: Celebrating Stephen Hawking's 60th Birthday by G.W. Gibbons, E.P.S. Shellard, S.J. Rankin, Eds.
The Cosmic Century: A History of Astrophysics and Cosmology by Malcolm S. Longair

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