NASA is building a lunar rover that can think for itself
In short: Current Mars rovers move at a crawl, often getting stuck in treacherous dust or rocks. NASA is testing a new prototype called ERNEST to change that. By combining active suspension with adaptive artificial intelligence, it aims to navigate extreme terrains autonomously—moving faster and farther than anything we've sent before.
The development of the Exploration Rover for Navigating Extreme Sloped Terrain (ERNEST) began in 2022 at NASA's Jet Propulsion Laboratory. Unlike previous rovers like Perseverance or Opportunity, which use a 'rocker-bogie' system to passively distribute weight across six wheels, ERNEST is a compact four-wheeled prototype. It features novel mesh wheels and an active suspension system that allows it to lift individual wheels to clear obstacles that would stymie current explorers.
The rover's intelligence is rooted in reinforcement learning. Before hitting the sand, it accumulated thousands of hours of experiential data in a virtual environment by running multiple simulations simultaneously. This training allowed the rover to develop the ability to identify and overcome obstacles autonomously. During a March 2026 field test in California's Colorado Desert, ERNEST completed a 16-mile trek over 37 hours with minimal human intervention, reaching speeds up to 0.6 mph—more than ten times faster than Perseverance.
NASA is using these tests to refine mobility hardware and autonomy software for future long-range missions to the moon and Mars. The goal is to create a vehicle twice the size of ERNEST capable of 'science road trips' across planetary surfaces. Testing also included navigating through dawn, dusk, and nighttime conditions to simulate the extreme shadows found in lunar polar regions.
While ERNEST is a prototype, it builds on decades of experience, such as the 2009 Desert RATS field test where astronauts and geologists lived inside a Lunar Electric Rover for 14 days to scout geological features. These iterative steps from desert simulations to autonomous prototypes are essential for reaching previously inaccessible areas.
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Sources
- Summary by Intellect · source: NASA Completes Desert Lunar Rover Testing
- Also: NASA tests advanced new Mars rover prototype in the California desert (video) | Space
- Also: NASA testing advanced capabilities for moon, Mars rovers
- Also: Desert Field Test With NASA Advanced Rover Prototype - NASA Science
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