Elon Musk plans solar-powered data centers in orbit, says “space is called space for a reason”

SpaceX has set out a plan to shift large-scale artificial intelligence computing away from Earth and into orbit, following its acquisition of xAI. The proposal comes amid growing pressure on terrestrial data centres, which consume vast amounts of electricity, generate significant heat, and require constant cooling. According to SpaceX, global demand for AI compute is rising faster than land-based energy systems can support without social or environmental cost. Elon Musk has argued that even aggressive expansion of renewables will struggle to keep pace. Writing on the SpaceX website, he framed the issue as one of physical limits rather than policy, suggesting that Earth-based solutions alone will impose increasing strain on communities as AI use expands dramatically.

SpaceX and xAI merger will help building solar-powered data centers in space

Musk's argument centers on energy availability. In orbit, satellites can draw near continuous solar power without interruption from night cycles or weather. Cooling requirements are also reduced in space. “The only logical solution, therefore, is to transport these resource-intensive efforts to a location with vast power and space,” Musk wrote, adding that “space is called space for a reason.” He described orbital data centres as systems with low operating and maintenance needs, able to scale without competing for land, water, or grid capacity. “It’s always sunny in space,” he said, summarising the appeal of orbital energy access.

A step towards “becoming a Kardashev II level civilisation”

SpaceX estimates that launching a million satellites to operate as orbital data centers could dramatically expand global computing capacity. Musk described this as “a first step towards becoming a Kardashev II level civilisation,” referring to a hypothetical society capable of harnessing the full energy output of its star. Such a level would far exceed planetary limits, allowing large-scale engineering, advanced scientific research, and long-term resilience against global threats. In Musk’s view, space-based AI infrastructure could support billions of users while helping secure a multiplanetary future.

Starship positioned as the enabling launch system

The scale of the plan depends on launch capacity that has not previously existed. Musk noted that even in 2025, the most active year in orbital launch history, only about 3000 tonnes of payload reached orbit, largely through Falcon missions carrying Starlink satellites. That demand drove rapid improvements in Falcon’s flight rate. A similar pattern is expected for Starship. With each launch capable of delivering around 200 tonnes, frequent flights could eventually place millions of tonnes into orbit annually, enabling space-based data centres at a meaningful scale.

Lunar manufacturing and deeper space expansion outlined

SpaceX also links the concept to future activity beyond Earth orbit. Starship is expected to support heavy cargo landings on the Moon, where factories could use local materials to build satellites. Musk suggested electromagnetic launch systems could then deploy AI platforms deeper into space. Using this approach, he claimed it may be possible to place hundreds of terawatts of AI capacity into deep space each year, gradually ascending the Kardashev scale and opening the way for sustained human expansion beyond Earth.