More than 50 years have passed since the first rover, the Soviet Lunokhod 1, touched down on lunar soil and, over 322 days, traveled 10 km. This is how our closest space exploration began, so to speak. We no longer photographed or analyzed with telescopes and instruments: we sent technology directly to the chosen location. Since then, 7 lunar rovers, as many on Mars (the first being Sojourner in 1997) and three that explored asteroids have been added to the list.
Over the course of half a century, these “planetary navigators” have allowed us to set foot on stellar objects with a common philosophy: move slowly, think hard and not take unnecessary risks. It has been an extraordinarily effective strategy. Thanks to it, vehicles such as the aforementioned Sojourner, Spirit, Opportunity, Curiosity or Perseverance have survived for years in one of the most hostile environments in the solar system. But it also has a price: speed.
On a good day, Perseverance only travels a few tens or hundreds of meters. Before each trip, engineers located millions of kilometers away study photographs of the terrain, plan the route and send instructions that the vehicle will execute hours later. It is an extremely cautious way of driving. NASA wants to change that.
In the Colorado desert, engineers at the Jet Propulsion Laboratory are testing a new prototype called ERNEST (Extreme Terrain Navigation Exploration Vehicle), a vehicle that could become the model for future explorers destined for the Moon, Mars and even other worlds in the solar system.
The main difference compared to the current ones is not in their appearance, but in their brain. ERNEST incorporates much more advanced autonomy systems that allow it to analyze the terrain in real time and decide for itself which is the best trajectory, greatly reducing the need to wait for instructions from Earth. This capability is especially important when communications can take more than twenty minutes to travel the distance between the two planets. In that interval, a vehicle completely dependent on ground operators can barely react to an unexpected obstacle.
It also changes the way you move. While Curiosity and Perseverance use the well-known six-wheel system with rocker-bogie suspension, ERNEST uses only four wheels, but each can be raised and positioned independently to overcome rocks, steps and slopes that would leave current rovers blocked. During tests carried out in March 2026 It traveled about 26 kilometers through the desert, facing dunes, steep slopes and very uneven terrain with minimal intervention from engineers. Maintaining that pace, in the five years that Perseverance has been exploring Mars, ERNEST would have been able to travel nearly 300 kilometers.
This indicates that the most striking improvement may be speed. ERNEST reached approximately one kilometer per hour, about ten times faster than Perseverance or Curiosity can normally travel when traversing difficult terrain. It may not seem like much compared to a car, but for a planetary rover it is a huge change. Thus, in five years, the life of Perseverance, ERNEST would have traveled nearly 300 km. Although the prototype is being developed with the Moon and Mars in mind, its technologies could end up traveling much further.
NASA considers them compatible with future missions aimed at exploring especially complicated regions, such as the permanently shadowed craters of the lunar south pole, where It could hide water ice, or Martian mountainous terrain that until now was too dangerous for a conventional rover. The project also fits with an increasingly clear trend in space exploration: combining ground vehicles with new aerial platforms.
The best example is Dragonfly, the gigantic drone that NASA will launch towards Titan in 2028. Unlike a traditional rover, Dragonfly will be able to take off, travel several kilometers through the air and land at different points to study the prebiotic chemistry of Saturn’s largest moon. For decades, sending a rover meant accepting an inevitable limitation: exploring slowly. New autonomy systems, artificial intelligence and mechanical designs like ERNEST’s are beginning to question that idea.
Perhaps in a few years, space explorers will no longer be simple vehicles waiting for instructions from Earth. They will be true exploration companions capable of deciding for themselves which rock is worth analyzingwhat slope they can climb and what is the best path to discover a world that no human being has ever set foot on.