The stacking of a United Launch Alliance Atlas 5 rocket this week at Cape Canaveral signals the start of a busy six-week campaign to ready ULA’s trusty workhorse launcher for its debut in a new human-rated configuration in mid-December.

Crowned with a European-built communications satellite designed to broadcast television over the Americas, a SpaceX Falcon 9 rocket with a previously-flown first stage booster lifted off Kennedy Space Center’s launch pad 39A Wednesday at 6:53 p.m. EDT (2253 GMT).

Two veteran NASA astronauts rocketed away from the Kennedy Space Center in Florida on Saturday to begin a test flight of a new commercial spaceship designed, built and owned by SpaceX.