NASA's acting administrator Sean Duffy opened lunar landing competition to other companies after delays by which SpaceX vehicle?

NASA's ambitious Artemis program, aiming to return humans to the Moon, faced a pivotal moment when acting administrator Sean Duffy announced the agency would open its lunar landing competition to additional companies. This decision stemmed directly from concerns over the development timeline of SpaceX's Starship, which was initially selected as the sole Human Landing System (HLS) provider for the Artemis III mission. The Starship vehicle, while revolutionary in its design and capabilities, encountered significant delays in achieving key milestones necessary for a crewed lunar landing, such as successful orbital refueling and a full orbital test flight.

The original 2021 contract awarded to SpaceX tasked the company with developing a Starship variant specifically optimized for lunar landings. However, as the 2027 target for the Artemis III mission approached, the pace of Starship's development raised questions about its readiness. To mitigate risks and ensure the United States could meet its lunar exploration goals, especially in the context of increasing international competition, NASA sought to diversify its options for getting astronauts to the lunar surface.

This move by Sean Duffy, who served as acting NASA administrator from July to December 2025, signaled a strategic shift to foster greater competition and accelerate the return to the Moon. By inviting other aerospace companies, such as Blue Origin, to submit proposals for lunar landers, NASA aims to build redundancy into the Artemis program and ensure a more robust pathway for future lunar missions. The goal is to ensure American astronauts can land on the Moon on schedule and establish a sustained presence there.