Live coverage: Atlas 5 countdown and launch journal

Orbital ATK’s Minotaur-C rocket delivered 10 satellites to orbit Oct. 31 after liftoff from Vandenberg Air Force Base in California, marking the solid-fueled rocket’s return to flight — with a new name and upgrades — after a six-year hiatus.

A SpaceX Falcon 9 rocket is being readied for launch with a classified payload for the National Reconnaissance Office early Sunday, the commercial launcher’s 33rd overall flight, and first dedicated to a U.S. government national security mission.

NASA’s OSIRIS-REx spacecraft today moved a step closer to starting a voyage to explore an uncharted world in our solar system — the mountain-sized Asteroid Bennu — by joining the booster rocket that will propel it from Earth next week.