The Falcon 9 is an working, reusable two-part rocket that is launched using its nine Merlin engines in its first part and a special Merlin engine that was made for places where there is no air. It is powered by liquid oxygen and fuel made for rockets called RP-1. It can hold up to 22,800 kilograms (50,300 pounds), and can also support SpaceX's Dragon vehicle. It is the first rocket able to get into orbit that can get its first part back to earth.