Jet Formation in Super-massive Black Holes

An exact solution to the force-free magnetosphere of a Kerr black hole is discussed within the context of the Blandford- Znajek mechanism. The resulting null current vector field of the solution is decomposed into two future pointing timelike vector fields, one of which is able to extract energy from to black hole to the asymptotic regions. We conclude the discussion by considering the astrophysical implications and limitations of this exact solution.