NASA Taps Eric Schmidt's Relativity Space for 2028 Mars Weather Mission

In a move that signals a dramatic shift in how deep-space exploration is funded and executed, NASA has selected California-based Relativity Space to launch a dedicated weather satellite to Mars in 2028. The mission, dubbed Aeolus, will provide the first daily, global map of the Martian atmosphere.[1][3]

The agreement operates under a newly minted public-private partnership model that treats interplanetary transit as a commercial delivery service. Under a six-year Space Act Agreement, researchers at NASA's Ames Research Center in Silicon Valley will design and build the scientific payload. Relativity Space will be responsible for everything else: designing the spacecraft, providing the launch vehicle, and managing the interplanetary cruise operations.[1][2][3][6]

For NASA, the arrangement is a financial and operational force multiplier. By offloading the immense cost of spacecraft development and launch infrastructure to the private sector, the agency can dedicate its resources strictly to high-value scientific instruments and data processing. NASA Administrator Jared Isaacman noted that pairing the agency's world-class instruments with commercial innovation will reduce the time it takes to get essential data into the hands of researchers.[2]

The scientific centerpiece of the mission is the Aeolus payload, a suite of four complementary instruments designed to work in tandem. While previous orbiters like MAVEN and the Mars Reconnaissance Orbiter have studied the Martian atmosphere, they have done so partially and independently. Aeolus aims to combine key atmospheric parameters into a single, comprehensive daily picture.[2][5]

The instrument suite includes a Doppler Wind and Temperature Sounder to measure profiles from the surface up to 60 kilometers in altitude, and a Thermal Limb Sounder to observe dust and water-ice clouds. A Surface Radiometric Sensor Package will measure the planet's surface energy balance, while a Wide-Field Context Camera will capture global images of atmospheric activity every single day.[3][6]

Understanding Martian weather is not merely an academic exercise; it is a critical prerequisite for future exploration. The Martian atmosphere presents a unique engineering paradox: it is dense enough to cause severe aerodynamic heating during spacecraft entry, but too thin to allow for effective braking using parachutes alone.[5]

This delicate balance is frequently upended by the planet's volatile weather. Massive dust storms can engulf the entire globe and last for months, drastically altering the density of the atmosphere at the exact altitudes where spacecraft need to decelerate.[5]

By gathering continuous, global data on winds, temperatures, and dust behavior, Aeolus will allow scientists to refine their models of atmospheric behavior. This data will directly influence the design of entry, descent, and landing systems, significantly reducing the risk for future robotic payloads and, eventually, crewed missions. NASA has committed to supporting the science operations for at least one Martian year, which equates to roughly 687 Earth days.[2][3][5]

Beyond the atmospheric science, the Aeolus mission serves as a high-profile proving ground for Relativity Space and its CEO, former Google chief executive Eric Schmidt. Schmidt acquired a controlling stake in the 3D-printing rocket startup in March 2025, stepping in as chief executive after the company ran low on capital.[1][4]

Schmidt brought with him a highly specific ambition: putting server-class computing infrastructure into space. The 2028 Mars mission will make that vision literal by carrying what Relativity calls a "Relay Data Center" into Martian orbit.[4]

This orbital data center will feature massive onboard storage and server-class compute capabilities, allowing the spacecraft to run advanced artificial intelligence models locally. Instead of beaming raw, uncompressed data across millions of miles of space, the onboard systems will process complex algorithms and autonomously manage responsive science operations, returning large, refined data volumes to Earth via high-bandwidth optical and radio links.[4]

The financial engine behind Relativity's side of the mission is equally unconventional. The company has stated that the Aeolus spacecraft is flying for a philanthropic customer, demonstrating a new model for public-private science collaboration. While the identity of the philanthropic backer remains undisclosed, the arrangement shields NASA from the financial burden of the launch vehicle.[4]

However, the agency's reliance on Relativity Space carries substantial technical risk. Despite its ambitious interplanetary roadmap, Relativity Space has never successfully reached Earth orbit.[4][5]

The company was founded on the premise of manufacturing rockets entirely via 3D printing. Its first vehicle, the small-lift Terran 1, flew a single time in March 2023. While the rocket successfully passed through the region of maximum aerodynamic pressure, its second-stage engine failed, and the vehicle fell into the Atlantic Ocean without reaching orbit.[4][5]

Following that failure, Relativity retired the Terran 1 to pivot entirely to the Terran R, a much larger, partially reusable medium-class rocket designed to compete with SpaceX's Falcon 9. The Terran R is currently slated for its maiden launch in late 2026 or 2027, leaving a tight development window to prove its reliability before the 2028 Mars transfer window opens.[2][4][5]

If the Terran R development slips, the Aeolus mission will inevitably slip with it, as orbital mechanics dictate strict launch windows for Mars transit. Yet, if Relativity can execute on Schmidt's aggressive timeline, the payoff will be historic.[4]

Successfully delivering a NASA payload to Mars would instantly validate Relativity's deep-space capabilities, potentially making it the first private company to reach the Red Planet—a milestone that even industry giant SpaceX has yet to achieve with a dedicated commercial mission. For NASA, the gamble represents a calculated bet that the commercial space sector is finally ready to extend its reach beyond the Moon.[4]