Time-lapse: Falcon 9 lifted vertical on pad 39A (members only)

A United Launch Alliance Delta 2 rocket fired away from a California military base and disappeared into an overcast cloud deck Saturday on its final flight, carrying a NASA research satellite into orbit and closing the book on a nearly 30-year legacy of launches.

Two veteran spacemen embarking on a marathon yearlong mission in orbit must first sprint through a busy workday Friday — suiting up for liftoff, climbing into their Soyuz spaceship, then flying to the International Space Station.

SpaceX is gearing up for the first commercial launch of its powerful Falcon Heavy rocket as soon as early April with a communications satellite for Arabsat, and the U.S. Air Force hopes the two side boosters from the Arabsat mission can be safely landed and reused for the military’s first Falcon Heavy mission this summer, an exercise officials said will help certify previously-flown hardware for future national security launches.