Orbit achieved.
Your spacecraft did not survive.
Drag from the launch pad to aim — a dashed line shows your initial velocity vector. The green arc previews an approximate orbit (Velocity Verlet integration).
Use the THRUST slider to set launch speed. Press LAUNCH to release the craft. You can fire short thrust burns during flight by clicking the spacecraft in flight mode (uses fuel).
★ 1 star for completing the objective. ★★ for completing in ≤ 2 tries. ★★★ for completing in 1 try.
Physics: Newton's law of gravitation, integrated at 240 Hz (4 substeps × 60 FPS) using Velocity Verlet. Trajectories follow real Keplerian orbits — there are no shortcuts.