Artist's illustration of SpaceX's Starship vehicle on an Artemis mission to the surface of the moon. (Image credit: NASA/Blue Origin/SpaceX) With the Artemis 2 crew back home after their historic circumlunar voyage, attention now turns to getting astronauts back on the surface of the moon. But how are the landers that will make such an ambitious endeavor possible progressing? NASA recently outlined a revised plan for Artemis 3 , which has the mission performing a crewed test in Earth orbit in late 2027 rather than the previously planned 2028 lunar landing. The mission will instead be an Earth-orbit rendezvous of NASA's Orion spacecraft with one or both of the program's moon landers, analogous to the Apollo 9 mission, setting up a lunar landing attempt with Artemis 4 in late 2028. But this plan relies on swift action by NASA's partners.…