Acting NASA Administrator Sean Duffy has directed the agency to fast-track plans to put a nuclear reactor on the moon.

The first moon landing under NASA’s return-to-the-moon program, known as Artemis, is scheduled for 2027, but many experts find that timeline unlikely. Many of the needed components, including the Starship lunar lander under development by SpaceX, are still unproven.

NASA is accelerating its plans for a nuclear reactor on the moon. For several years now, the agency has been working to get a 40-kilowatt fission system ready for launch to the moon by the early 2030s. But interim NASA chief Sean Duffy is about to announce a more ambitious path, via a directive set to be released this week, according to Politico.