A technology that could power crewed missions to Mars and robotic spacecraft throughout the solar system was recently tested in the U.S. NASAof Jet Propulsion Laboratory, Southern California. The achievement is a milestone that engineers and space scientists have been trying to achieve for decades and brings the prospect of humans setting foot on Mars closer to reality. For years, the main obstacle to manned deep space travel has not been ambition or funding, but physics, specifically, the brutal mathematics of how much fuel a chemical rocket must carry to carry a manned spacecraft across hundreds of millions of kilometers of space. JPL’s demonstration in February 2026 shows that the gap is finally starting to close. The test didn’t make a Mars mission imminent, but it made it possible in a way that even cautious engineers would find hard to deny.
NASA Mars thruster test sets new U.S. manned mission power record
On February 24, 2026, NASA tested its new Magneto-Plasma Power (MPD) thruster in a dedicated water-cooled vacuum chamber at JPL’s Electric Propulsion Laboratory. During the test, engineers ignited the thruster five times and observed that the tungsten electrode in the center of the thruster burned brightly and the temperature reached over 2,800 degrees Celsius. The test successfully set a new power record in the United States at 120 kilowatts, estimated to be 25 times larger than the thrusters on NASA’s Psyche spacecraft, which is currently en route to asteroid 16 Psyche and contains the most powerful electric thrusters NASA has ever flown. This comparison is important. Psyche represents the upper limit of NASA’s current resources devoted to spaceflight. The fact that this new thruster dwarfed it in the test chamber shows how significant this leap could be, not just incrementally, but in terms of the categories of missions that suddenly became conceivable.
What makes this thruster different from anything NASA has flown before
To understand why this test is important, it helps to understand what electric propulsion actually is and why it is considered the most likely path for humans to reach Mars efficiently.Electric propulsion is not new to NASA. The agency is already using solar electric thrusters on missions such as Spirit. These systems use electricity to accelerate propellant, using up to 90% less propellant than traditional chemical rockets. The trade-off is that thrust chemical rockets produce a lot of thrust. In contrast, electric propulsion increases speed gradually and continuously, making it less suitable for launches but well suited for long-distance deep space travel, where weeks and months of steady acceleration translate into truly impressive final speeds.Unlike traditional electric thrusters, which use electric fields to accelerate ions, MPD engines use electrical currents and magnetic fields to generate thrust, allowing for higher-power operation. This distinction allows lithium-fed MPD thrusters to operate at power levels beyond current ion drives. Lithium metal vapor propellant, which burns at extreme temperatures in chambers, is central to this advantage because it allows the system to handle power inputs that would disrupt conventional thruster designs. The concept behind MPD thrusters is not new, dating back to research work in the 1960s, but turning theory into a viable propulsion system required decades of incremental progress. What JPL is now proving is that engineering has finally caught up with physics.
The numbers behind Mars missions
The February test was a proof-of-concept rather than a finished product, and NASA is well aware of that. according to NASA Jet Propulsion LaboratoryThe team aims to reach power levels of 500 kilowatts to 1 megawatt per thruster in the next few years. Since the hardware operates at such high temperatures, proving that the components can withstand the high temperatures of prolonged testing will be a key challenge.This challenge is heightened by the scale required for a manned mission to Mars. as Phys.org reportsFuture human missions to Mars will require 2 to 4 megawatts of power, consist of multiple thrusters, and require more than 23,000 hours, approximately 958 days, or 2.6 years of continuous operation. That’s not a sprint. This is an ongoing durability test of hardware operating in one of the harshest environments imaginable, with temperatures that would destroy most materials, and in a vacuum where on-the-fly repair is impossible.Therefore, February’s 120 kW result is only a first step, not the final answer. But this is just the first step in validating the core methodology, confirming that the design can operate reliably at record power levels and generating data that can directly inform the next series of tests. From an engineering perspective, this is exactly what a successful proof-of-concept test should do.
Image: NASA/JPL-Caltech
Why getting to Mars faster is actually important
People tend to view faster Mars crossings as a matter of convenience or ambition. In fact, it is a medical and surgical necessity. With every additional day astronauts spend in deep space, their cumulative exposure to cosmic radiation increases, and current shielding technology only partially mitigates this risk. Muscle degradation in microgravity, the psychological stress of isolation, and the compound probability of mechanical failure are all directly related to mission duration.Electric propulsion is designed for steady acceleration rather than explosive liftoff power. After a week in space, a spacecraft using this system will travel through the solar system at a speed of more than 400,000 kilometers per hour. This speed, sustained during a Mars transit, compresses the journey time in a way that chemical rockets simply cannot match without carrying fuel, which would make the mission impossible to launch in the first place.
