SpaceX’s Space-Based Data Centers to Use Liquid Ammonia Cooling, Complicating Satellite Disposal

• June 10, 2026

SpaceX is advancing a bold strategy to populate near-Earth orbit with space-based data centers designed to expand the company’s computing infrastructure. Each of these orbital data centers is reported to be as large as a commercial airplane and will integrate innovative cooling technology to manage the heat generated by their onboard systems.

Liquid Ammonia Cooling System Presents New Challenges

According to information shared by Elon Musk, the founder and CEO of SpaceX, the data centers will rely on a liquid cooling mechanism employing liquid ammonia. This choice is notable because ammonia’s thermal properties make it an effective coolant for high-performance electronics operating in a vacuum and the extreme temperature fluctuations of space. However, incorporating liquid ammonia introduces significant complications.

One key issue involves the end-of-life management of these satellites. The use of liquid ammonia as a cooling medium means the space data centers cannot be readily disposed of through conventional atmospheric re-entry procedures. Typically, decommissioned satellites re-enter Earth’s atmosphere and burn up, but the presence of liquid ammonia complicates this process due to potential environmental and safety hazards.

This raises questions about how SpaceX will manage the orbital debris and environmental impacts associated with these large, ammonia-cooled data centers once their operational service concludes. The company’s approach highlights a broader challenge in the expanding realm of space infrastructure—balancing technological advancements with sustainable orbital practices.

The development aligns with SpaceX’s broader vision of creating a network of powerful computing assets beyond Earth’s surface. By situating data centers in space, the company aims to leverage factors such as reduced cooling demands from ambient temperatures and potential latency improvements for certain applications.

Despite these advantages, the integration of liquid ammonia cooling spotlights an emerging frontier in aerospace environmental stewardship. As space becomes increasingly congested with commercial and governmental payloads, the disposal and lifecycle management of such complex assets will become a critical consideration for all space-faring entities.

SpaceX’s initiative illustrates the technological trade-offs involved in pioneering space-based solutions that combine scale, cooling efficiency, and operational sustainability. Moving forward, the aerospace industry will be closely watching how these challenges are addressed to foster a safer and cleaner orbital environment.

SpaceX plans to deploy space data centers cooled by liquid ammonia, creating challenges for satellite disposal due to the cooling system’s composition.