NASA has unveiled revised trajectories for its commercial lunar landers, altering the propulsion responsibilities for SpaceX and Blue Origin ahead of a targeted 2028 crewed landing. The updated architecture, disclosed on October 23, moves engineering tasks between vehicles, aiming to streamline the journey to the Moon's surface.
Under the new plan, SpaceX's Starship will push the Orion capsule from Earth orbit into a low lunar orbit. In contrast, Blue Origin's Blue Moon lander will rely on three separate transfer stages that detach as their propellant is consumed, followed by a rendezvous in an elliptical polar lunar orbit. Both approaches replace the earlier requirement to meet Orion in a near-rectilinear halo orbit, a change NASA says will reduce lander propellant demands and shorten return trips from the lunar surface.
However, the agency has not released specific fuel savings figures, leaving the claimed benefits unquantified. This has prompted industry analysts to scrutinize the readiness of each vehicle stack. For SpaceX, Orion must now tolerate propulsion forces from the docked Starship during the departure burn, necessitating modifications to the crew capsule. Blue Origin, meanwhile, faces the challenge of assembling and operating a multi-stage propulsion system in orbit, with propellant transfers deferred until after the stages are in place.
The distinction is critical when evaluating mission readiness. A lower rendezvous option for Blue Moon, reported by Ars Technica, could ease the lander's descent and ascent tasks but adds complexity elsewhere, including the development of an extended Centaur V upper stage with United Launch Alliance. This option would require additional propulsion and spacecraft integration work, highlighting the trade-offs inherent in each route.
NASA's separate Artemis III flight plan, also dated October 23, outlines a 14-day Earth-orbit mission in 2027 with four astronauts. This mission will include a two-hour Starship docking test and a two-day evaluation of Blue Moon's cabin, where astronauts will enter the lander to assess its atmosphere, controls, and life support systems. These tests aim to expose interface issues before lunar operations, but they will not measure the fuel consumption of a complete lunar transfer.
CNN's same-day broadcast corroborated both transport concepts, with NASA Administrator Jared Isaacman stating, "NASA must own the near impossible rather than shifting the burden to our partners." The agency maintains its 2028 landing target, but the competition between SpaceX and Blue Origin remains open, with the first landing assignment yet to be decided.
Risks loom over the timeline. Orion modifications and the extended upper-stage option require engineering qualification. Blue Moon must demonstrate staged operations after orbital assembly, while Starship must prove cryogenic aggregation and the combined spacecraft's propulsion sequence. Any delays could compress the assessment period before a crewed landing.
NASA requires uncrewed demonstrations before either provider can carry astronauts to the lunar surface. The updated contracts add two Starship crew-cabin demonstrations and Blue Moon hardware-readiness milestones, but the agency has yet to quantify the redesigned routes' fuel savings. As the 2028 target approaches, the measured performance of these milestones will be pivotal in determining which vehicle earns the first crewed landing mission.
