Real orbital mechanics. Pull back, aim, burn — and pray your gravity assist actually works.
The orbital puzzle game for people who want to fly across the solar system but only have five minutes.
Keplerian orbits, eccentric trajectories, SOI transitions. Not a cartoon — a simulation. Every burn costs delta-v, every gram of fuel matters.
Each crux is a self-contained orbital puzzle. Waiting for coffee? Nail a Hohmann transfer. On the bus? Try a two-burn gravity assist. No save files, no 40-hour campaigns.
Pull back to set your burn vector. Release to fire. Feels like Angry Birds, works like mission control. Your intuition is the flight computer.
Each mission is a single orbital problem. Pick one.
Learn the basics by circularizing your orbit around Earth. You start in an elliptical orbit and must perform a maneuver to achieve a stable circular orbit.
Master the art of orbital rendezvous. You need to match orbits with a target spacecraft and approach within close range. This is essential for docking operations and space station visits.
Understand the six cardinal directions in space: prograde, retrograde, normal, anti-normal, radial, and anti-radial. Learn how velocity changes affect your orbit.
Learn how different burns at different positions affect your orbit. Understand the fundamental principle: you change the opposite side of your orbit.
Learn to plan missions by calculating total delta-V requirements. Master the art of fuel budgeting for complex multi-stage missions.
Journey from the red planet to the largest object in the asteroid belt. Ceres is a dwarf planet with potential subsurface oceans, making it a prime target for exploration. Execute a direct transfer and achieve orbit insertion around this mysterious world.
"He had used more than nine-tenths of his fuel and had boosted in the wrong direction."
— Vernor Vinge, The Peace War (1984)