Fire lance und atomuhr: was sie gemeinsam haben
- Schritt 1. Fire lance — nutzt — Gunpowder. A gunpowder charge.
- Schritt 2. Gunpowder — wird verwendet in — Rocket. The first rockets were powered by gunpowder.
- Schritt 3. Rocket — entwickelte sich zu — Liquid-propellant rocket engine. Goddard switched to liquid fuel.
- Schritt 4. Liquid-propellant rocket engine — ist Teil von — Reusable rocket. Liquid-propellant engines.
- Schritt 5. Reusable rocket — hat als Teil — GPS (satellite navigation). Navigation during landing.
- Schritt 6. GPS (satellite navigation) — nutzt — Atomuhr. The satellites carry atomic clocks; the position is calculated from signal arrival times.