NASA's SpaceX Crew-9 Commander Looks at a Grid Fin

Moveable grid fins, like this one Commander Zena Cardman inspects on a SpaceX Falcon 9, help control a rocket’s upright return on a landing pad. That prevents damage. SpaceX can then recover—and reuse—the rocket, engines, and grid fins. Recoverable rockets reduce launch costs. Less expensive rockets make spaceflight possible for even more nations and companies.