Q&A with John Shannon, Boeing’s SLS vice president and program manager (members only)

The first satellite in a new class of ultra-powerful communications satellites for Intelsat lifted off Wednesday aboard the first Ariane 5 flight of the year. Launch from French Guiana occurred at 2320 GMT (6:20 p.m. EST).

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.

Chinese scientists and engineers are counting down to launch of a heavy-lift Long March 5 rocket Monday with the Chang’e 5 mission, an ambitious attempt to land on the moon, drill samples from beneath the lunar surface, and return the material to Earth.