Falcon 9 is a reusable two-stage-to-orbit medium-lift launch rocket designed and manufactured by SpaceX. It uses SpaceX Merlin engines, burning cryogenic liquid oxygen and rocket-grade kerosene as its propellants. On Wednesday, SpaceX and NASA confirmed that they would launch the Crew-1 mission on 14th November, and it will carry four astronauts to the International Space Station. But the plan had to be delayed as SpaceX engineers found an unrecognizable substance in the engines. The launch w...