Video: Orion countdown status briefing

Fueled segments of the solid rocket boosters that will lift off on the first flight of NASA’s Space Launch System have arrived at the Kennedy Space Center in Florida, but officials will hold off on stacking the boosters until the SLS core stage completes a crucial test-firing later this year.

December’s first orbital test flight of NASA’s Orion crew capsule was almost perfect, but engineers are carefully analyzing 600 gigabytes of data recorded on the spacecraft’s trip 3,600 miles into space to see how future missions to an asteroid and Mars could be improved.

Astronauts will likely perform a previously-unplanned demonstration of the Orion spacecraft’s deep space rendezvous capabilities in a high-altitude orbit around Earth on the crew capsule’s first piloted test flight, now scheduled for 2023.