Live coverage: Soyuz blasts off on third mission for O3b

Two satellites equipped to broadcast television programming to millions of homes across the United States and Latin America are braced for launch from French Guiana on Wednesday aboard an Ariane 5 rocket.

Nearly four weeks after its arrival at the International Space Station, a SpaceX Dragon supply ship departed the research lab Saturday and dropped out of orbit for a parachute-assisted splashdown in the Pacific Ocean southwest of Los Angeles. The Dragon capsule was released from the station’s robotic arm at 4:58 a.m. EST (0958 GMT), and splashdown occurred at approximately 10:36 a.m. EST (1536 GMT).

The Italian PRISMA Earth observation satellite is set to ride a Vega launcher into a 382-mile-high (615-kilometer) orbit Thursday night from French Guiana on a mission that will take less than one hour from liftoff until spacecraft separation.