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.
Change your orbit altitude from 400 km to 800 km using a Hohmann transfer. Learn how to efficiently raise your orbit.
Deep dive into the two most important points in your orbit. Learn to use them strategically for efficient maneuvering.
The ultimate challenge: perform a complete mission from Earth to Saturn orbit with an absurdly limited fuel budget. Use every trick in the book - gravity assists, aerobraking, low-energy transfers, and perfect timing.
Your spacecraft has suffered a malfunction and you need to return to Earth immediately. Perform an emergency de-orbit and atmospheric entry with limited fuel and tight time constraints.
Learn to plan missions by calculating total delta-V requirements. Master the art of fuel budgeting for complex multi-stage missions.
"The tiny golden spark that represented his spacecraft fell away from the green disk of the departure world, inward toward the yellow sun about which all revolved."
— Vernor Vinge, The Peace War (1984)