A SpaceX Falcon 9 rocket carried an Argentinian Earth-observation satellite into space Sunday and for the first time landed a first-stage booster back at its California launch site. The primary purpose of the mission was to place the SAOCOM 1A satellite into orbit, but SpaceX also wanted to expand its recovery of first stages to its launch site at Vandenberg Air Force Base, about 130 miles (209 kilometers) northwest of Los Angeles. SpaceX had previously flown first-stage rockets back to land after Florida…