NASA announced a new plan this week to build a $20 billion base on the surface of the moon instead of an orbiting Lunar Gateway station, the latest move in a transformative phase of the space agency’s mission.

NASA Administrator Jared Isaacman made the announcement at an event he called “Ignition,” where he spoke about the future of NASA’s space policy under the Trump administration. He declared that “America will never again give up the moon,” and delivered a hopeful message for the future of America’s space exploration.