Both New Glenn and Vulcan Centaur are expected to launch in 2021.

The factory might not represent Blue Origin's only footprint in the Huntsville area, either. The company is also working on a deal to take over a building at NASA's Marshall Space Flight Center previously used to test Saturn V and Space Shuttle engines. Not surprisingly, Blue Origin would use it for acceptance testing with both the BE-4 and BE-3U.

These plans have been in the works for a while. Blue Origin signaled plans to build the Huntsville factory in June 2017, but that hinged on ULA choosing the BE-4 for its rocket. It made that decision in September 2018, clearing the way for its newly confirmed partner. Even with that kind of a run-up, it's still a big step forward -- Blue Origin can spend less time talking about its post-New Shepard plans and more time fulfilling its promises.