More than 800 people have paid as much as $200,000 apiece to reserve seats on commercial flights into space, some of which are expected to launch, at long last, within a year. Space-travel agents are being trained; space suits are being designed for sex appeal as much as for utility; the founder of the Budget hotel chain is developing pods for short- and long-term stays in Earth’s orbit and beyond. Over beers one night, a former high-ranking NASA official, now employed by Sir Richard Branson of the Virgin transportation conglomerate, put it plainly: ‘We happen to be alive at the moment when humanity starts leaving the planet.’