SpaceX's newly launched capsule with four astronauts arrived on Monday at the International Space Station, their new home until spring. The Dragon capsule pulled up and docked late Monday night, following a 27-hour, completely automated flight from NASA's Kennedy Space Center. The linkup occurred 422 km above Idaho.

"Oh, what a good voice to hear," space station astronaut Kate Rubins called out when the Dragon's commander, Mike Hopkins, first made radio contact. "We can't wait to have you on board," she added after the two spacecraft were latched together. This is the second astronaut mission for SpaceX. But it's the first time Elon Musk's company delivered a crew for a full half-year station stay.