Landmine und GPS (satellite navigation): was sie gemeinsam haben

1. Schritt 1. Landmine — nutzt — Gunpowder. Chinese mines of the 13th century were filled with gunpowder.
2. Schritt 2. Gunpowder — wird verwendet in — Rocket. The first rockets were powered by gunpowder.
3. Schritt 3. Rocket — entwickelte sich zu — Liquid-propellant rocket engine. Goddard switched to liquid fuel.
4. Schritt 4. Liquid-propellant rocket engine — ist Teil von — Reusable rocket. Liquid-propellant engines.
5. Schritt 5. Reusable rocket — hat als Teil — GPS (satellite navigation). Navigation during landing.

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