Once upon a time -- oh, about eight years ago -- it cost as much as $400 million to launch a rocket to space. But then along came SpaceX. Advertising launch prices as low as $67 million to put 22 tons of cargo in low Earth orbit with its Falcon 9 rocket, and developing a Starship vehicle that could launch 5 times more cargo for $2 million or less, SpaceX is making real progress toward its goal of lowering the cost of space travel by a factor of 100. Granted, Starship still hasn't conducted a suc...