Summary of Key Points
Elon Musk's SpaceX and NVIDIA have collaborated on a major project called Starmind, which aims to launch one million satellites into space to create a “supercomputer.” This initiative is driven by the increasing challenges associated with traditional data centers on Earth—high energy consumption, water usage, and large land footprints. While space offers unlimited solar energy, heat dissipation remains a significant challenge. Starmind complements SpaceX's Starlink project, which focuses on communication; however, the launch of one million satellites could lead to competition for orbital resources. Both China and the United States are actively pursuing similar initiatives in space computing, marking the beginning of a fierce race for supremacy in this field.
Why Move Data Centers into Space?
The demand for computing power, driven by the surge in artificial intelligence (AI), is outpacing the capabilities of traditional data centers on Earth:
- High Energy Consumption: In 2025, China’s data centers are expected to consume 170 billion kWh of electricity, nearly equivalent to the output of two Three Gorges dams. The United States faces even more severe power shortages, which has caused public complaints.
- Large Water Usage: Google’s data center in Iowa uses 5.3 million tons of water for cooling annually, and since seawater cannot be used (as it would corrode equipment), the evaporated water depletes local water resources.
- Limited Land Availability: Large data centers often need to be located in remote areas. For example, Tencent has built its facilities in caves in Guizhou, while Alibaba and Huawei have set up centers in Ulanqab, Inner Mongolia, due to the abundance of renewable energy and cooler climates. Nevertheless, these locations are still not sufficient to meet demand. In July this year, the governor of New York state explicitly halted the construction of a new superdata center.
Elon Musk believes that moving data centers into space eliminates many of these constraints. Space lacks the same geographical and regulatory limitations, and since Starlink already occupies a significant portion of the orbits (over 8,000 satellites), SpaceX can reduce costs by producing and launching satellites in-house.
The Advantages and Challenges of Space Data Centers
Advantages:
- Unlimited Energy: The absence of an atmosphere in space means that solar panels can generate up to 7-10 times more power than on Earth, and the energy is free. This significantly reduces operating costs for businesses.
Challenges:
- Heat Dissipation: In a vacuum, heat must be dissipated through electromagnetic waves, which is less efficient than using water for cooling. SpaceX has addressed this issue by developing liquid-cooled panels that increase the surface area for heat dissipation. The heat dissipation capacity of Starmind’s satellites has been improved to 1400 W/m², significantly enhancing their performance.
The Relationship Between Starmind and Starlink
Starlink serves as the “space communication infrastructure,” while Starmind focuses on computing tasks. Together, they provide a comprehensive solution that enables remote areas (such as deserts and oceans) to access computing resources without relying on ground-based networks.
SpaceX has established a specialized satellite manufacturing facility in Texas, similar in size to its Tesla factory in Shanghai, to mass-produce Starmind satellites. The first batch is scheduled to be launched next year.
Is There Enough Space for One Million Satellites?
The low Earth orbit is limited, with only about 60,000 satellites currently in use out of a total capacity of approximately 16,000. Starmind may utilize higher orbits to avoid congestion. Both China and the United States have applied for thousands of additional satellites, although the actual number launched will depend on available resources. However, this expansion has raised concerns among astronomers, as Starlink’s satellites already interfere with astronomical observations.
Is China Participating in This Race?
China is actively involved in space computing initiatives:
- In May 2025, Zhejiang Lab and Chengdu Guoxing Aerospace launched 12 satellites for computing purposes.
- Zhejiang Lab’s “Three-Body Computing Constellation” plan aims to launch 1,000 satellites by 2032 to build a space-based computing network.
- Beijing University of Posts and Telecommunications’ “TianSuan Constellation” was launched in 2023, and other institutions such as Fudan University and Deep Space Matrix are also working on similar projects.
- Zhongguancun announced the construction of a space data system at an altitude of 700-800 kilometers.
The competition in space computing is primarily between China and the United States, as launching satellites and building systems requires substantial funding and technology that other countries find difficult to match.
Is This Just a Vision or the Real Future?
Elon Musk believes that humanity is currently at a level of civilization 0.7 (based on energy utilization) and that space-based computing could propel us towards a level 2, enabling the use of stellar energy. Although the idea of one million satellites sounds ambitious, the rapid development of AI suggests that space-based computing may soon become a viable solution to Earth’s resource constraints. One thing is certain: humanity’s footsteps are already leading toward the stars.