Four things we’d need to put data centers in space
Foto: MIT Tech Review
The data center sector currently consumes between 1% and 2% of the world's electricity, and the rapid development of artificial intelligence could drastically increase this demand. A solution to this problem may be moving computing infrastructure into Earth's orbit, which would allow for the utilization of unlimited solar energy and the natural cooling of the vacuum of space. However, for the vision of orbital server rooms to become a reality, engineers must overcome four key barriers: the mass of the equipment, radiation resistance, connectivity issues, and servicing. Currently, launching one kilogram of payload into orbit costs thousands of dollars, necessitating radical hardware miniaturization. Servers must be redesigned to withstand extreme cosmic radiation without the heavy lead shielding that is standard in today's satellites. A key challenge remains data transmission latency; for users to enjoy seamless cloud services, the implementation of high-speed optical inter-satellite links is essential. For the average user, the success of such projects means not only more environmentally sustainable technology but also access to immense computing power without straining local power grids. Moving heavy AI computations beyond the atmosphere may become the only way to maintain the pace of the digital revolution while protecting the climate. This is no longer science fiction, but a necessity arising from the physical limitations of our planet.
In January of this year, SpaceX, owned by Elon Musk, submitted an application to the U.S. Federal Communications Commission (FCC) for permission to place up to one million data centers in Earth orbit. This bold vision is not merely a technological whim, but a response to the growing demand for computing power that terrestrial installations are unable to satisfy. Moving IT infrastructure into outer space could solve problems with cooling and energy access, but it requires overcoming barriers that are currently testing the limits of engineering.
Extreme thermal management in a vacuum
On Earth, data centers consume gargantuan amounts of water and energy to cool thousands of heat-generating processors. Paradoxically, although outer space is associated with piercing cold, heat dissipation in a vacuum is one of the most difficult challenges. The lack of air makes it impossible to use traditional fans or convection-based air conditioning systems. In space, the only way to get rid of thermal energy is through infrared radiation.
To prevent space server rooms from melting, it is necessary to use massive radiators with a large surface area that will emit heat into space. Engineers must precisely design systems based on liquid cooling loops that transport heat from the processors to external panels. Every watt of energy consumed by a server must be radiated away, which, at the scale of the million units planned by SpaceX, requires a breakthrough in the construction of lightweight and efficient heat exchangers.
Read also
Power supply and constant exposure to the sun
Another pillar of space infrastructure is a stable power source. Data centers operating in orbit must rely almost exclusively on solar energy. Although solar radiation intensity is significantly higher outside the atmosphere, servers require an uninterrupted power supply, even when they are in the Earth's shadow. This necessitates the installation of powerful energy storage systems that must be resistant to thousands of charge and discharge cycles.
- Utilization of high-efficiency solar panels (above 30%).
- Application of modern lithium-ion or solid-state batteries with low mass.
- Minimization of energy losses during voltage conversion inside the satellite.
The high costs of launching every kilogram of payload into orbit mean that power systems must be characterized by the highest power-to-weight ratio. SpaceX plans to use its Starship rocket to drastically reduce these costs, but the energy efficiency of the servers themselves remains a key parameter determining the profitability of the entire venture.
Armor against cosmic radiation
Electronics in space are exposed to the destructive effects of high-energy particles and gamma radiation. On Earth, we are protected by the atmosphere and magnetic field, but in orbit, a single solar flare can permanently damage RAM or processors, leading to bit-flip errors or total hardware failure. Traditional servers used in terrestrial data centers would stop working in space almost immediately.
The solution is to use radiation-hardened components, which are, however, significantly more expensive and often offer lower performance than their civilian counterparts. An alternative that researchers are working on is software-level redundancy and physical shields made of polyethylene or other hydrogen-rich materials. The challenge lies in finding the sweet spot between protection and satellite weight so that millions of SpaceX data centers can operate without failure for years.
Laser connectivity and transmission delays
Moving data into space makes no sense if it cannot be quickly transmitted back to Earth. Traditional radio waves have limited bandwidth and are susceptible to interference. The key to the success of space data centers is laser communication (optical inter-satellite links). It allows for the transmission of vast amounts of information between satellites and to ground stations at speeds measured in terabits per second.
The vision of a million data centers in orbit requires the creation of a new layer of the internet, where routing takes place in a vacuum and data travels at the speed of light between nodes, bypassing terrestrial bottlenecks.
Such an architecture allows for the reduction of latency in intercontinental communication, as light in a vacuum moves approximately 30% faster than in glass fiber optics. However, maintaining precise laser beam targeting on an object moving at thousands of kilometers per hour is a masterpiece of optical engineering that must become a standard in each of the million planned modules.
The implementation of the SpaceX project and placing data centers in space will change the paradigm of the global network. Moving the most energy-intensive computing processes beyond our planet could not only relieve the terrestrial ecosystem but also create a foundation for a future interplanetary economy. Although thermal and radiation barriers are immense, the pace of innovation in the NewSpace sector suggests that Earth orbit will soon become the world's most important "cloud" region.
