SpaceX Lands a Reusable Rocket

On December 21, 2015, SpaceX's Falcon 9 rocket launched 11 commercial satellites into orbit, then its first stage booster flew back to Cape Canaveral and landed upright on a concrete pad — the first time an orbital-class rocket booster had been successfully recovered. The achievement, after years of spectacular failures (several boosters had exploded on landing attempts), validated Elon Musk's central thesis: that reusable rockets could dramatically reduce the cost of access to space. SpaceX went on to routinely reuse boosters, with some flying over 20 times. Launch costs dropped from roughly $54,500/kg to orbit (Space Shuttle era) to under $2,720/kg on Falcon 9. The innovation opened space to commercial operators, small satellite companies, and eventually space tourism, ending the era of expendable rockets that had defined spaceflight since its inception.