Video: Delta 2/SMAP pre-launch news conference

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.

In a commercial push to return to the Moon while celebrating the 50th anniversary of Apollo 11, Astrobotic Technology Inc. has contracted with United Launch Alliance to use an Atlas 5 rocket to send the Peregrine lander to the lunar surface in 2019.

An automated mini-helicopter driven by two fast-spinning, counter-rotating rotors took off from the surface of Mars, hovered for 30 seconds, then successfully landed Monday to complete the historic first powered flight of an aircraft on another planet.