Spherical-harmonics gravity (Gottlieb), tides, and third-body for the astrodyn orbital-dynamics pipeline
Pipeline orchestration, VehicleBuilder, and recipes — single API surface for ECS adapters
Aerodynamic drag, SRP, gravity-gradient torque, shadow, and contact for the astrodyn orbital-dynamics pipeline
Bevy ECS adapter for the astrodyn orbital-dynamics gateway
Planet definitions and presets (Earth, Moon, Sun, Mars) for the astrodyn orbital-dynamics pipeline
Rigid-body dynamics, integrators (RK4, RKF45, GJ, ABM4), mass tree, and body initialization
Time scales (TAI/UTC/UT1/TDB/TT/GMST) and converters for the astrodyn orbital-dynamics pipeline