🕳️ Black Hole Orbit Lab: ISCO, Perihelion Precession and Light Bending in Schwarzschild Spacetime

Fly a probe around a non-rotating black hole on true Schwarzschild geodesics: watch the periapsis rosette, the innermost stable circular orbit, the plunge, the slowing clock and light rays bent or captured at 3 sqrt(3) M. Live effective-potential chart and independent numerical checks against closed forms.