NASA wants to send spare nuclear-powered Mars rover to the lunar surface

[Ron Schultz]

That test rover is called PROMISE, short for "Polar Rover for Observation, Mapping, and In-Situ Exploration" (though it was formerly known as Optimism). 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.

https://www.space.com/astronomy/moon/promise-me-the-moon-nasa-wants-to-send-spare-nuclear-powered-mars-rover-to-the-lunar-surface