Stellar BLACK HOLES
Nuclear Fusion Ends - Gravity Overcomes Neutron Degeneracy - > 3 Sol Mass
SCHWARZSCHILD - STATIC
    PHOTON SPHERE - Light Orbits, Exit Cone, Closest Orbital Radius
        R = 3/2 Event Horizon,  33.5 km at 3 Sol Mass,   Varies Linearly
    EVENT HORIZON - Escape Velocity > Light Speed,  Space/Time folded in enclosure
        Schwarzschild RADIUS = 2 x Gravitational Constant x Mass divided by Light Speed squared
            or 3 km x Sol Mass,  Varies Linearly
    SINGULARITY - Point containing all Mass
KERR - ROTATING
    External Space & Time dragged in direction of Rotation, 2 Event Horizons & 2 Photon Spheres
    OUTER EVENT HORIZON - Time Stops, further in Reverses
    INNER EVENT HORIZON - Time Stops again, further in Re-Reverses
    STATIONARY LIMIT - OUTER EVENT HORIZON - Space-Time Flows at light Speed
        Particle Remains Static
        Same Diameter as Event Horizon at Equator,  Squashes & Touches Event Horizon at Poles
    ERGOSPHERE - Between Stationary Limit & Event Horizion
        Max. R is 1/2 Schwarzschild  R,  Exit Possible
    COUNTERROTATING PHOTON SPHERE - Outer Radius of Orbiting Photons, Exit Cone
    COROTATING PHOTON SPHERE - Inner Radius of Orbiting Photons, Exit Cone
    SINGULARITY - Becomes a Ring
REISSNER-NORDSTROM - CHARGED
    2 EVENT HORIZONS
    OUTER EVENT HORIZON - Shrinks as Charge Increases
    INNER EVENT HORIZON - Increases as Charge Increases