Video: Delta 4-Heavy tower rollback

Boosted to an altitude of 3,604 miles by a Delta 4 rocket, NASA’s Orion deep space exploration vehicle fell back to Earth Friday in the program’s maiden voyage, slamming into the atmosphere at nearly 20,000 mph, enduring a hellish 4,000-degree re-entry and settling to a Pacific Ocean splashdown to wrap up a critical unmanned test flight.

As a United Launch Alliance Delta 4-Heavy rocket prepares to carry NASA’s Orion spaceship on its first orbital flight test, we look back at the seven previous Heavy launches.

The rollout of the 322-foot-tall rocket took fewer than 12 hours after first motion, which occurred at about 12:20 a.m. EDT (0420 UTC). NASA hopes to launch the crewed test flight to the Moon no earlier than April 1.