Saturday morning marked a significant milestone in spaceflight: the successful maiden launch of the SpaceX Falcon 9 rocket. For years, spaceflight has been ruled by governments and the military, but SpaceX is shaking things up by developing rockets on a purely commercial basis, and at a fraction of the price of competing offerings. SpaceX has had success in the past with its smaller Falcon 1 rocket, but the Falcon 9 is a much bigger machine: with around 20 times the payload capacity, it’s more than capable of launching crew and cargo to the ISS.

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