The Artemis program in the US aims to return to the Moon, land, and work on long-term expeditions and a permanent Moon base. At least for initial missions, astronauts will launch in an Orion capsule on top of the Space Launch System (SLS), and return in Orion. SLS and Orion made a first uncrewed test flight (Artemis I) in 2022, now it's time for a crewed test flight. It will only fly around the Moon once in a free-return trajectory without landing, but it will still be the first time since...