The NASA Office of Inspector General has concluded that SpaceX’s Starship lunar lander—selected to ferry NASA astronauts to and from the Moon—lags the agency’s original schedule by roughly two years and is likely to face additional delays. The report also flags delivery slippages from Blue Origin, warning that combined setbacks could jeopardise NASA’s aim of returning humans to the lunar surface by 2028.
The finding is a blunt assessment of a programme that has depended heavily on nascent commercial technology. Starship, a fully reusable heavy-lift launcher and lander, was chosen in 2021 as NASA’s Human Landing System (HLS) to carry crew from lunar orbit to the surface. But the vehicle’s ambitious scale, an aggressive development cadence and repeated test and certification milestones have proved hard to meet on the timetable originally envisioned by NASA.
Technical complexity is only one constraint. Starship’s development has required a succession of large-scale prototype flights, iterative design changes and substantial ground infrastructure upgrades. Each of these steps carries schedule risk: longer-than-expected test campaigns, component redesigns and the need to satisfy safety and certification requirements for crewed missions can stretch timelines further than optimistic projections.
Blue Origin’s lander efforts are also running late, the Inspector General says, compounding NASA’s problem of having reliable, certified cargo and crew transports ready when the agency needs them. Blue Origin’s path has differed from SpaceX’s, but its own delays reduce NASA’s redundancy and options—an important factor when a single slip can cascade across a tightly sequenced Artemis schedule.
The immediate consequence is programmatic strain on Artemis, NASA’s umbrella effort to return astronauts to the Moon and establish a sustainable presence. A missed 2028 target would force Washington and NASA to revisit budgets, partner commitments and the sequencing of related elements such as lunar infrastructure, scientific payloads and the role of international and commercial partners. It would also expose NASA to political scrutiny over contract management and oversight of commercial partners.
Beyond domestic politics, the delays matter for strategic signalling. Space exploration has become as much about geopolitical posture as scientific discovery. As Washington recalibrates timelines, competitors and partners alike will be watching closely: nations investing in lunar capacities may accelerate their own programmes or seek deeper bilateral arrangements with other spacefaring states and firms.
For now, NASA faces a narrow set of choices: accelerate technical and regulatory work where feasible, develop contingency plans that rely on additional commercial or international assets, or accept a slipping schedule for crewed lunar landings. The Inspector General’s warning will add urgency to internal reviews and to decisions in Congress about funding priorities for the agency and its contractors.