SpaceX Quiz: Test Your Rocket Science Knowledge!

Reusing orbital-class rocket boosters was widely considered impractical before SpaceX attempted it. Successfully landing a booster after orbital velocity requires precise engine reignition, grid fin control, and structural durability. Achieving this and reflying the same booster changed launch industry economics.

After NASA retired the Space Shuttle, it relied on commercial partners to keep the International Space Station supplied. SpaceX developed a capsule carrying pressurised cargo, experiments, and equipment to the station, returning samples safely to Earth. It was the first commercial spacecraft to berth with the ISS.

The Raptor engine powers SpaceX's Starship vehicle and ranks among the most powerful rocket engines ever built for its size. Thrust output measures an engine's ability to lift mass off the ground. SpaceX significantly improved the Raptor's performance between its first and second generation versions.

Satellites in low Earth orbit must hand off signals between each other for seamless global coverage. Optical inter-satellite links allow data to travel through space without relying on ground relay stations. SpaceX integrated this technology into its second-generation Starlink satellites for improved global routing.

Rocket engine efficiency depends on how propellants are fed and burned in the combustion chamber. Some cycles waste unburned propellant through exhaust, while others recycle it for maximum energy extraction. The Raptor uses an advanced thermodynamic cycle that had never been used in an operational rocket before.