NASA tests unprecedented 120-kilowatt space engine to enable manned trips to Mars

A team of scientists from NASA’s Laboratório from Propulsão to Jato (JPL) has successfully completed the activation of a prototype electric thruster with unprecedented capabilities in the Estados Unidos. The equipment, developed in partnership with researchers from Universidade, Princeton and Centro Glenn, located in Cleveland, operated in the 120 kilowatt power range. The index achieved represents a strength 25 times greater than any other similar system already evaluated in the country. The technical demonstration took place at the space agency’s facilities during the month of February 2026.

The experiment took place inside the condensable metal propellant vacuum chamber, known by the acronym CoMeT, which allows safe tests with metallic vapors. The device used lithium vapor as its main fuel to generate the necessary thrust. Durante the five ignitions carried out by the engineers, the engine’s tungsten electrode registered temperatures exceeding 2,800 degrees Celsius. Technological advancement establishes a concrete basis for planning future manned missions to the planet Marte.

Funcionamento of the magnetoplasmadynamic system in the laboratory

The tested equipment is classified as a magnetoplasmadynamic system, often called by the acronym MPD in the aerospace sector. The technology differs from conventional electric motors by applying high-intensity electrical currents that interact directly with a magnetic field generated in the thruster core. Essa physical interaction electromagnetically accelerates the lithium plasma out of the engine. The continuous process creates a constant thrust in the vacuum of space. Previous Modeloss relied almost exclusively on solar panels to generate power, limiting the Sol’s ability to accelerate over distances much further away.

Building the prototype required two years of intense work by joint engineering teams. JPL senior research scientist James Polk hailed the results obtained in the vacuum chamber as a key milestone for deep space exploration. Data captured by the sensors indicated that the thruster not only operated stably, but also reached exactly the power levels designed by the mission’s mathematicians. Collecting this information provides precise parameters for building even larger versions of the equipment.

The concept of the MPD propellant has been circulating in academic circles since the 1960s, but practical application faced severe technological barriers. Operations at such high powers had never occurred on American territory until this experiment. The specific use of lithium as an engine power source also represents a significant innovation, as this propellant format has never flown operationally on an official mission. Validation of the concept in the laboratory ends decades of uncertainty about the viability of the model.

Vantagens operational compared to traditional chemical rockets

The transition from chemical to electrical propulsion offers substantial economic and logistical benefits for planning interplanetary travel. The JPL team’s calculations indicate that the electrical systems could consume up to 90% less propellant compared to the high-power rockets currently used to break Terra’s gravity. Essa drastic savings in the volume of fuel required reduces the total weight of the spacecraft at launch. Consequentemente, the financial costs of each mission drop sharply, allowing heavier payloads to be sent.

The flight mechanics of electric propulsion operate under a physical principle that is distinct from the burning of traditional fuels. Chemical engines generate controlled explosions that produce an immediate and violent thrust, exhausting the tanks in a few minutes. The electrical system, on the other hand, collects energy from a central source and uses it to ionize and expel small fractions of gas slowly and uninterruptedly. Essa persistent force accumulates speed over months in a vacuum, eventually surpassing the maximum speed of conventional rockets.

The space agency already uses less powerful versions of this technology on active missions in the solar system. NASA’s Psyche probe currently travels at more than 200,000 kilometers per hour using electric motors that apply a small but constant force. The researchers project that the new lithium MPD thrusters will deliver thrust vastly superior to the models in operation. Combining these high-output engines with compact nuclear reactors emerges as the most viable solution to support the weight of the life support modules needed to deliver humans to Marte.

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Desafios thermals and targets for interplanetary exploration

The success of the test in February 2026 also highlighted technical obstacles that engineering will need to overcome before the first flight. The main challenge lies in managing the extreme heat generated by the magnetoplasmadynamic system during periods of acceleration. Temperatures in the region of 2,800 degrees Celsius require the creation of new metallic and ceramic compounds capable of withstanding thermal stress without melting or deforming. The search for sufficiently robust materials will guide the next years of research in the agency’s laboratories.

With preliminary data consolidated, program directors established a new schedule of technical goals for the next decade of development. The objectives seek to scale current technology to the standards required for long-term manned travel. Priorities include:

• Elevar the capacity of each thruster to range from 500 kilowatts to 1 megawatt.
• Sintetizar metal alloys that maintain structural integrity above 2,800 degrees Celsius.
• Garantir the uninterrupted operation of the engine for a period exceeding 23 thousand hours.
• Sincronizar the operation of multiple thrusters integrated into the same space chassis.
• Acoplar safe nuclear power sources to power the system during the journey to Marte.

Space mission architects calculate that a manned spacecraft bound for the Red Planet will require between 2 and 4 megawatts of total energy to complete the journey in a biologically safe time for the astronauts. Meeting this massive energy demand will require the installation of an array containing multiple MPD thrusters. Esses engines will need to operate simultaneously and flawlessly for almost three continuous years, without any possibility of external maintenance during deep space transit.

Nuclear-propelled Programa and the agency’s timeline

NASA Administrator Jared Isaacman followed the lab results and called the engine firing a historic event for aerospace engineering. The executive highlighted that the operation of an electrical system at these power levels marks a paradigm shift in the Estados Unidos. The experiment is part of the Propulsão Nuclear Espacial program, known as SNP, which coordinates the government’s efforts to master new generation transportation technologies. The initiative seeks to guarantee the necessary infrastructure for the expansion of human presence beyond lunar orbit.

Isaacman reiterated that the institution’s long-term focus remains fixed on the arrival of an American crew to the Martian surface. The agency conducts multiple parallel projects, but maintains strategic investments aimed at making this exploratory leap possible. Lithium thruster performance represents tangible, measurable progress within the timeline established by exploration boards. Validation of MPD technology reduces uncertainty about the final design of interplanetary transport vehicles.

The knowledge base that enabled the construction of the new engine derives from decades of practical experience accumulated by the agency. Missões pioneers such as Deep Space-1 and the Dawn probe served as test platforms for the first generations of electric propulsion in space. Especialistas like James Polk have applied lessons learned from these robotic satellites to work around the design flaws of older models. The continuous evolution of ion and plasma acceleration systems now culminates in the lithium prototype, paving the way for the construction of ships that will cross interplanetary space in the coming decades.