Live coverage of Delta 4 countdown and launch

The ocean-sailing ship that transports rocket stages from United Launch Alliance’s factory to U.S. launch sites completed its latest voyage overnight, pulling into port to deliver the Atlas 5 that will send a cargo freighter to the International Space Station in March.

Tucked inside a shipping crate aboard an Air Force C-5 transport aircraft, the Navy’s next mobile communications satellite has flown from California to Florida in preparation for liftoff this summer.

Viasat has modified an existing contract with Arianespace to launch one of the company’s next-generation broadband Internet satellites on Europe’s next-generation Ariane 6 rocket, rather than on-board an Ariane 5 launcher, officials announced Monday.