<br /> For all of SpaceX’s recent livestreamed launches of its reusable Falcon Heavy rockets, broadband satellites and NASA’s planet-hunting satellite TESS, you’d be forgiven in assuming it's the only major commercial space developer worth mentioning.<br />But Amazon CEO Jeff Bezos and his spaceflight company Blue Origin want to remind us that the space race to send tourists into the stratosphere is still going strong. <br />
