CAPE CANAVERAL, Fla. (AP) — An ailing astronaut is back on Earth. The crew of four have returned Thursday, ending their space station mission more than a month early in NASA’s first medical evacuation. SpaceX guided the capsule to a middle-of-the-night splashdown in the Pacific near San Diego. The trip home took less than 11 hours after the astronauts exited the International Space Station. It was an unexpected end to a mission that began in August and left the orbiting lab with only three on board. NASA and SpaceX have said they will try to move up the launch of the next crew, currently targeted for mid-February.