If all goes according to plan, four astronauts are set to become the first humans to travel past the confines of our planet’s gravity well to the Moon in over half a century. And though drama has plagued the Artemis program, this next mission is starting to really come into focus. But the Orion was already stacked on the SLS in October inside the building, allowing the astronauts to conduct the rehearsal. The last time humans were anywhere near the Moon was during NASA’s Apollo 17 mission, which launched a hair over 53 years ago. More on Artemis 2: NASA Not Paying Moon Astronauts as They Prepare to Risk Their Lives