Photos: Atlas 5 rocket soars from West Coast

In a significant milestone preparing for liftoff of the world’s most powerful rocket, SpaceX test-fired 31 of the booster’s 33 methane-fueled engines Thursday in South Texas as the company eyes a launch attempt as soon as March.

Astrobotic, a Pittsburgh-based company developing a robotic lunar lander, will launch its first moon mission under contract to NASA on the debut flight of United Launch Alliance’s Vulcan Centaur rocket in 2021, officials announced Monday.

An 11-hour practice countdown was completed Friday at Cape Canaveral’s launch complex 41 for the planned launch of an Atlas 5 rocket and Boeing’s Starliner capsule later this month. The rocket was loaded with super-cold liquid oxygen and liquid hydrogen in a full dress rehearsal for launch day.