CAPE CANAVERAL, Fla. SpaceX launched a prototype of its Mars rocketship hundreds of feet into the air, then landed it upright in a successful test flight. Mars is looking real, SpaceX founder and chief executive Elon Musk tweeted after the short hop. Progress is accelerating.Musk said several more short hops are planned before a test version of Starship aims for a high altitude. On Sunday, SpaceX safely returned two NASA astronauts from the International Space Station following a two-month test flight. We're going to send people to Mars and make life multi-planetary," Musk said following splashdown.