NASA Partners With Relativity Space for 2028 Mars Weather Mission

NASA has officially initiated a paradigm shift in how it conducts deep-space research, announcing a sweeping public-private partnership with Relativity Space to send a suite of weather instruments to Mars in 2028. The mission, dubbed Aeolus, represents a critical evolution in planetary science logistics. While the space agency has spent the last decade relying on private companies to ferry cargo to the International Space Station and deliver scientific gear to the lunar surface, treating an interplanetary transit to Mars as a commercial delivery service is a relatively untested frontier. Under the newly unveiled framework, NASA will act purely as the scientific architect and customer, while Relativity Space assumes the burden of providing the spacecraft, the launch vehicle, and the complex interplanetary flight operations required to reach the Red Planet.[1][2]

The core objective of the Aeolus mission is to illuminate a persistent blind spot in planetary science: the chaotic and unpredictable nature of Martian weather. For decades, orbiters and rovers have gathered localized or periodic data, but Aeolus is designed to provide the first integrated, daily, global view of Martian winds, temperatures, dust storms, and cloud formations. Researchers at the NASA Ames Research Center in California’s Silicon Valley are currently designing and building the specialized instruments that will make this possible. By continuously monitoring the atmosphere, scientists hope to map the seasonal behaviors that govern the planet's harsh environment, transitioning Martian meteorology from a series of snapshots into a fluid, predictable model.[3][4]

Understanding these atmospheric dynamics is not merely an academic exercise; it is a strict prerequisite for the future of human spaceflight. NASA Administrator Jared Isaacman, who announced the partnership, framed the collaboration as a necessary acceleration of the agency's long-term goals. Unpredictable dust storms and sudden shifts in wind shear pose existential threats to the entry, descent, and landing systems of incoming spacecraft. By generating detailed environmental knowledge, Aeolus will directly inform the engineering tolerances required for heavier robotic landers and, eventually, crewed habitats. Isaacman noted that pairing the agency's world-class instruments with commercial investment acts as a "force multiplier," reducing the time it takes to get essential safety data into the hands of mission planners.[2][3]

The scientific payload itself is a highly specialized suite of four complementary instruments, engineered to dissect the Martian atmosphere from the edge of space down to the regolith. The primary tool is the Doppler Wind and Temperature Sounder, or DWTS-Ozone, which will measure precise wind speeds and temperature profiles from the planet's surface up to an altitude of approximately 37 miles. This is paired with a Thermal Limb Sounder, an instrument tasked with capturing vertical temperature gradients and observing the formation and movement of water-ice clouds. Together, these two sensors will provide a three-dimensional map of the atmospheric currents that drive global dust events.[4][5]

Rounding out the payload are two instruments focused on the interaction between the atmosphere and the ground. The Surface Radiometric Sensor Package will measure the surface energy balance, tracking how sunlight is absorbed and radiated back into space, while also analyzing the physical properties of settling dust. Meanwhile, the Wide-Field Context Camera will capture comprehensive daily images of global atmospheric activity, providing visual confirmation of the data recorded by the other sensors. NASA has committed to supporting the science operations for at least one full Martian year—roughly 687 Earth days—and will develop a dedicated data-processing pipeline to convert the raw telemetry into ready-to-use models for the broader scientific community.[5]

The administrative mechanism enabling this mission is NASA’s first six-year reimbursable Space Act Agreement tailored specifically for Mars exploration. This legal framework provides a stable, predictable structure for sustained collaboration without the rigid constraints of traditional government procurement. Under the division of labor, NASA can dedicate its budget strictly to high-value scientific instrument development and data analysis, completely bypassing the multibillion-dollar financial burden of engineering a bespoke launch vehicle and deep-space bus. Relativity Space, in return, gains the ultimate proving ground: a high-profile, government-backed interplanetary journey that, if successful, will instantly elevate the company into the upper echelon of global aerospace contractors.[2][6]

However, the partnership carries an immense and undeniable technical risk, primarily because NASA is entrusting a flagship Mars payload to a company that has never successfully reached Earth orbit. Founded in 2015 by a pair of former engineers from SpaceX and Blue Origin, Relativity Space initially garnered industry attention for its radical manufacturing approach: using massive, AI-driven 3D printers to fabricate entire rockets from raw alloys in a matter of weeks. But the company’s first orbital attempt, the Terran 1 rocket, suffered a catastrophic second-stage engine failure mid-flight in March 2023, falling short of orbit and forcing a painful internal reckoning about the viability of small-lift launch vehicles.[6][7]

Following the Terran 1 failure, Relativity Space abandoned its small-rocket program entirely, pivoting its resources toward the Terran R—a much larger, medium-to-heavy lift reusable rocket designed to compete directly with SpaceX’s Falcon 9. The Terran R is still deep in the development phase and has yet to conduct a maiden flight, which is tentatively scheduled for late 2026. The 2028 Mars launch window imposes an unforgiving, aggressive timeline on the company. In less than four years, Relativity must finish developing a reusable orbital rocket, successfully test it, design and build a deep-space cruise vehicle capable of surviving the journey to Mars, and flawlessly integrate NASA’s delicate atmospheric instruments.[8][9]

The company’s ability to even attempt this timeline is largely due to the dramatic intervention of Eric Schmidt. The former Google chief executive and billionaire tech investor stepped in during a period of severe fundraising challenges for the aerospace startup. In March 2025, Schmidt acquired a controlling majority stake in Relativity Space and installed himself as chief executive officer. His vast financial resources stabilized the company, ensuring the Terran R program could continue without the constant threat of insolvency that plagues many space startups. Under Schmidt’s leadership, the company has aggressively expanded its ambitions beyond simple launch services, eyeing deep-space infrastructure as its primary growth vector.[4][6]

Schmidt’s vision for Relativity Space extends far beyond traditional aerospace engineering; he views the vacuum of space as the next logical frontier for massive computing infrastructure. When he took over the company, Schmidt explicitly stated his ambition to deploy data centers in orbit, arguing that off-world processing is essential for the future of space exploration. The Aeolus mission serves as the first literal manifestation of that goal. Alongside NASA’s weather instruments, Relativity’s spacecraft will carry what the company calls a "Relay Data Center." This proprietary payload represents a radical departure from standard deep-space probes, which typically rely on radiation-hardened, low-power processors that lag decades behind terrestrial commercial computing standards.[6]

The Relay Data Center is designed to bring server-class computing and mass storage directly to Mars orbit. By equipping the spacecraft with advanced processing power, the vehicle will be capable of running complex artificial intelligence models locally in deep space. Currently, Mars orbiters must beam massive volumes of raw data back to Earth over slow radio links, forcing scientists to wait hours or days to process the information. The Relay Data Center will allow the spacecraft to analyze the atmospheric data on the fly, identifying key weather anomalies and beaming only the most valuable, high-resolution insights back to Earth via high-bandwidth optical and radio links.[6]

Adding another layer of complexity to the mission is its unique funding structure. Relativity Space has noted that the Aeolus spacecraft is flying in part for a "philanthropic customer," widely believed within the industry to be Schmidt Sciences, the family foundation operated by the CEO. This arrangement makes the 2028 flight a fascinating hybrid of government science, private enterprise, and billionaire philanthropy. It also positions Relativity Space as a direct challenger to Elon Musk’s SpaceX. By attempting to leapfrog into interplanetary operations, Relativity is trying to prove its deep-space capabilities in a single, high-stakes mission, hoping to secure a foothold in the lucrative market for future off-world logistics.[3][7]

If the Aeolus mission launches on schedule and successfully reaches Mars, it will fundamentally rewrite the rules of planetary exploration. It will validate NASA’s calculated gamble that commercial startups can drastically lower the barrier to entry for deep-space science, allowing the agency to launch specialized instruments more frequently and at a fraction of historical costs. More importantly, the daily weather data beamed back by the orbiter will lay the vital meteorological groundwork required to safely land the next generation of heavy robotic explorers and, ultimately, the first human crews to walk on the Martian surface in the coming decades.[2][3]