SpaceX is about to make history by relaunching a used Falcon 9 rocket
In truth, only part of the Falcon 9 is being reused on this upcoming mission. After each launch, SpaceX tries to save just the first stage of its vehicles. That's the 14-story-tall main body of the Falcon 9 that contains the primary engines and most of the fuel. About 10 minutes or so after each launch, the first stage separates from the top portion...