Stats: Delta 4 history and manifest

About a year and a half after signing a Space Act Agreement with NASA to develop a commercial space station, Northrop Grumman formally withdrew from its solo plans in order to partner with Nanoracks, a subsidiary of Voyager Space.

Mission managers are weighing a motley mix of weather models, safety criteria and astronaut workload considerations as they decide when SpaceX’s Crew Dragon spacecraft might have the best chance to launch from the Kennedy Space Center.

Lockheed Martin, the largest U.S. defense contractor, announced late Sunday that it has reached a deal valued at $4.4 billion to acquire Aerojet Rocketdyne, a supplier of engines to NASA’s Space Launch System moon rocket and United Launch Alliance’s Atlas, Delta, and Vulcan rockets.