'PROMISE' me the moon? NASA wants to send spare nuclear-powered Mars rover to the lunar surface

PROMISE was developed at NASA's Jet Propulsion Laboratory (JPL) in Southern California, where it has been used as a test platform for fixes or commands that engineers want to try on the ground before permanently sending them to Perseverance and Curiosity. Now, NASA wants to send PROMISE on a mission of its own. Though sending PROMISE to the moon would leave Perseverance and Curiosity — both of which remain active on Mars — without an Earth-based testbed, Isaacman thinks it would be worth it. "We've had years now of experience operating the two rovers on the surface of Mars, and we've got this hardware that the taxpayers have invested a lot in," he said. "So the question was posed: 'What if we send it to the moon?'" With a little refurbishment, PROMISE would help advance NASA's lunar plans, Isaacman added. Like Perseverance and Curiosity, the test rover is powered by a radioisotope thermoelectric generator (RTG), which converts heat from naturally decaying radioactive material into electricity. So it wouldn't require sunlight to operate — a real benefit on the moon, where most locations experience long stretches of darkness. (NASA plans to build its Artemis base near the moon's south pole, which is thought to harbor an abundance of water ice and also has a relatively complex lighting environment.) The other robots currently in the works to launch on future missions to the moon, including the landers announced during today's update, are all solar powered. Through 2029, NASA hopes to launch up to 20 such missions as part of the CLPS (Commercial Lunar Payload Services) initiative to support the first phase of the agency's moon base plans, and the landers announced today will be some of the first in that lineup. Already expected this year was Blue Origin's Blue Moon Mark 1 cargo lander. It's slated to launch on the company's New Glenn rocket, which exploded last month during an engine test. That anomaly has complicated the Blue Moon timeline, though Blue Origin CEO Dave Limp has voiced confidence that New Glenn will launch again this year. Two lunar deliveries were awarded to Astrobotic's Griffin 1 lander, one of which will fly Astrolab's FLIP rover the surface of the moon in the second half of 2026. Contracts to Firefly and Intuitive Machines call for the use of their Blue Ghost and Nova C landers, respectively, on CLPS missions in the next few years. Three artist renderings depict commercial lunar landers from Astrobotic, Intuitive Machines, and Firefly on the moon.