🪐 Gravity Assist — 2D Flyby Hyperbola and Velocity Triangle

2D companion of the gravity assist lab: a patched-conic flyby in the planet frame with a hyperbolic trajectory integrated by RK4, the Sun-frame velocity triangle, and the speed gain versus periapsis radius, checked against the analytic turning angle.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install