Live coverage: Delta 2 launches

SpaceX’s Dragon supply ship returned to to Earth on Sunday with more than 3,800 pounds of NASA cargo, research specimens and other hardware. The commercial capsule was released from the International Space Station’s robotic arm at 4:40 a.m. EDT (0840 GMT), and splashdown in the Pacific Ocean west of Baja California occurred at approximately 10:15 a.m. EDT (1415 GMT).

SpaceX launched Argentina’s SAOCOM 1B radar observation satellite from Cape Canaveral at 7:18 p.m. EDT (2318 GMT) Sunday. A Falcon 9 rocket headed toward the south on a trajectory hugging the Florida East Coast on the first flight into polar orbit from Cape Canaveral since 1969, and the first stage booster returned to the spaceport for an onshore landing minutes after liftoff.

The mighty Titan — a pillar in American rocketry for five decades — flew into orbit for the final time Wednesday, capping a distinguished career of heavy-lifting that has spanned the nation’s space age.