Aim, release, watch

Three instruments: a heading dial, an elevation ladder, a power gauge. No thrusters, no steering, no second chances mid-flight. The whole puzzle is in the launch — and in reading the sky before you commit to it.

Real systems

Apollo 13's free-return around the Moon. The gap between Saturn's rings. The Trojan camp that shares Jupiter's orbit. Every trajectory is solved live by real physics.

A cabinet of what you found

Each system you solve leaves an observation card behind. They are sourced, and they are true.