Video: Liftoff of Atlas 5 rocket with Mexico’s Morelos 3

NASA has declared assembly complete on the core stage for the first Space Launch System heavy-lift rocket in New Orleans, signaling a long-awaited transition from manufacturing to testing as the core stage is set to move to the nearby Stennis Space Center in Mississippi for a hold-down firing next year of its four shuttle-era main engines.

A United Launch Alliance Delta 4 rocket lifted off from Cape Canaveral on Wednesday night with the U.S. Air Force’s eighth Wideband Global SATCOM communications satellite, lighting up the sky in these images taken from the nearby Kennedy Space Center press site.

A hydrogen-fueled main engine and four solid rocket boosters combined to propel a United Launch Alliance Delta 4 rocket off its launch pad at Cape Canaveral on March 15, successfully sending a U.S. Air Force communications satellite into orbit.