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.
Change your orbit altitude from 400 km to 800 km using a Hohmann transfer. Learn how to efficiently raise your 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 orbital period relates to altitude. Understand Kepler's Third Law and how to calculate when you'll arrive somewhere.
Execute a Hohmann transfer from Earth orbit to Mars orbit. Achieve Mars orbit insertion with minimal delta-V expenditure.
Establish a Sun-synchronous orbit for an Earth observation satellite. This special orbit keeps your satellite in constant sunlight, perfect for solar-powered imaging missions.
"He had used more than nine-tenths of his fuel and had boosted in the wrong direction."
— Vernor Vinge, The Peace War (1984)