Video: Missile alert satellite launches atop Atlas 5

If all goes according to plan, engineers in southern Mississippi later this month will load cryogenic propellants into the core stage of a rocket NASA says will launch astronauts back to the moon, exposing its tankage and internal plumbing to extreme operating conditions hundreds of degrees below zero for the first time. The fueling test — a major milestone in its own right — is a precursor to a high-stakes eight-minute test-firing of the Space Launch System’s four shuttle-era main engines planned as soon as November.

Another batch of Atlas 5 rocket launch photos from Wednesday’s flight for the U.S. Navy carrying the Mobile User Objective System spacecraft.

The final flight of Space Shuttle Discovery seen from the ET-Cam mounted near the top of its fuel tank. Mission STS-133 lifted off from the Kennedy Space Center on February 24, 2011. (Membership required)