NASA's rewriting its moon mission and SpaceX is potentially getting a much bigger role. Here's what's new. Instead of Boeing's space launch system rocket doing the heavy lifting to the moon, SpaceX's Starship would take over a key part of that job.Under the revised plan, Orion launches on SLS to low Earth orbit, then docks with Starship in orbit. Then Starship pushes Orion, carrying the crew, to lunar orbit. Once there, astronauts transfer into Starship, which takes them down to the surface.That's a major s ...