Video: Huge Rocket's Tank Test Stand Rises to the Sky

The agency showed off the two-year time lapse as part of an announcement that construction is complete on the stand, which will be used to develop the next-generation Space Launch System (SLS). NASA plans to test the rocket in a flight to the moon in 2021, and send astronauts on board later in the 2020s, the agency has said. The new facility, known as Test Stand 4693 and located at NASA's Marshall Space Flight Center in Alabama, is critical to making sure the liquid hydrogen tank for SLS can sta