NASA’s Jet Propulsion Laboratory has tested a new rover prototype named ERNEST, and it’s changing the game for space exploration. This compact four-wheeled rover drove 16 miles in just 37 hours across California’s Colorado Desert. That speed outpaces current Mars rovers by about ten times.

ERNEST stands for Exploration Rover for Navigating Extreme Sloped Terrain. It’s only four feet long but packed with advanced tech. Unlike the six-wheeled Mars rovers, ERNEST has mesh wheels and an active suspension system. This system lets it lift individual wheels over obstacles and even drive sideways. It can switch between energy-saving passive mode and terrain-tackling active mode on the fly.

Current Mars rovers like Curiosity and Perseverance move at about 0.06 miles per hour. ERNEST reached speeds up to 0.6 miles per hour in its tests. That’s a huge leap for robotic explorers. The increased pace means future missions could cover much more ground, opening the door to exploring tougher terrains like crater walls or lava tubes.

Active Suspension and Smart Autonomy

ERNEST’s suspension is a major upgrade from the rocker-bogie system used since Sojourner in 1997. The rocker-bogie design prioritizes stability but limits speed and adaptability. ERNEST’s active suspension uses powered joints to adjust the rover’s stance dynamically. It can “squirm,” “wheel-walk,” and climb obstacles that would stop older rovers.

The rover’s four wheels are independently steerable, allowing it to move sideways and wiggle out of tricky spots. Its mesh wheels handle soft or rocky ground better than the rigid aluminum wheels on Mars rovers, which have suffered damage over time. ERNEST has already climbed slopes as steep as 35 degrees during tests.

Training the Rover to Think for Itself

One of ERNEST’s key breakthroughs is its autonomy. NASA used reinforcement learning, a type of artificial intelligence, to train the rover’s navigation software. The rover learned by running thousands of simulated driving hours in a virtual environment. This training lets ERNEST quickly decide where to place its wheels and how to navigate without waiting for commands from Earth.

Signal delays between Earth and Mars can be up to 24 minutes each way. That delay forces current rovers to move cautiously. ERNEST’s ability to make faster decisions will help it cover more ground safely and efficiently. During the desert test, engineers let ERNEST run on a pre-planned route with minimal intervention, even during nighttime conditions that mimic the Moon’s dim polar lighting.

The rover’s software can now plan efficient paths that tackle obstacles it can climb or avoid hazards it can’t. This intelligence is crucial for missions in difficult landscapes on the Moon or Mars.

Looking Ahead to Lunar and Martian Missions

NASA is considering using ERNEST technology for future Moon missions. The lunar south pole has tricky terrain and limited sunlight windows. A rover like ERNEST could explore shadowed craters and icy regions more effectively than current designs. Its speed and agility would let scientists cover more ground during short operational periods.

Work on ERNEST began in 2022 with internal funding at JPL. It has since gained support from NASA’s Mars Exploration Program and other science offices. The current prototype is a quarter the size of a planned larger rover that could handle longer missions. That bigger rover would build on ERNEST’s active suspension and autonomy to explore even more challenging environments.

Despite its promise, ERNEST remains a prototype. NASA still needs to develop flight-ready versions that can survive launch, landing, and years of operation on other worlds. Still, this desert run shows what’s possible. Faster, smarter rovers could transform how we explore the Moon, Mars, and beyond.