Astronomy / Engineering
Touch down on the Moon
Bring the lander onto the illuminated target. Try automatic guidance, then control thrust and lateral tilt yourself while watching fuel and touchdown speed.
The model and its limits
Three-dimensional translation with variable fuel mass, a constant surface gravity set by the slider (Moon 1.62, Mars 3.71, Earth 9.81 m/s²) and a rate-limited attitude servo. Legs use a flat touchdown plane and inelastic contact. The vehicle is enlarged relative to the ground; altitude above 4 m is compressed. Read the instruments for physical distances.
Equations used in the module
Equations m dv/dt = F_thrust - m g; dm/dt = -F_thrust / (Isp g0); g = 1.62 m/s²
