Falcon 9

Falcon 9 is a partially reusable, two-stage-to-orbit, medium-lift launch vehicle designed and manufactured in the United States by SpaceX. The first Falcon 9 launch was on June 4, 2010, and the first Commercial Resupply mission to the International Space Station (ISS) launched on October 8, 2012. In 2020, it became the first commercial rocket to launch humans to orbit. With 686 successful flights, Falcon 9 has seen the most launches among active launch vehicles; it is noted for its reliability and high launch cadence, with two in-flight failures, one partial failure and one pre-flight destruction. The rocket has two stages. The first (booster) stage carries the second stage and payload to a predetermined speed and altitude, after which the second stage accelerates the payload to its target orbit. The booster is capable of landing vertically to facilitate reuse, a feat which was first achieved on flight 20 in December 2015. Additionally, the fairing halves are scooped out of water after a parachute-assisted landing and can be reflown multiple times. As of September 20, 2026, SpaceX has successfully landed Falcon 9 boosters 598 times. Individual boosters have flown as many as 37 flights. Both stages are powered by SpaceX Merlin engines, using cryogenic liquid oxygen and rocket-grade kerosene (RP-1) as propellants. The heaviest payloads flown to geostationary transfer orbit (GTO) were Intelsat 35e carrying 6,761 kg (14,905 lb), and Telstar 19V with 7,075 kg (15,598 lb). The former was launched into an advantageous super-synchronous transfer orbit, while the latter went into a lower-energy GTO, with an apogee well below the geostationary altitude. On January 24, 2021, Falcon 9 set a record for the most satellites launched by a single rocket, carrying 143 into orbit. Falcon 9 is human-rated for transporting NASA astronauts to the ISS, certified for the National Security Space...