Elon Musk Unveils SpaceX's Orbital AI Data Center Design Ahead of IPO

Elon Musk unveiled the most detailed look yet at SpaceX's planned AI1 orbital data center satellite in a video posted to X on June 8, describing a spacecraft 70 meters wide and 20 meters tall — the largest SpaceX has attempted to launch — equipped with a rack of AI chips, a 150kW solar array at 250 W/m², and a 110-square-meter deployable liquid radiator for thermal management. Musk characterized the design as a 'draft version of version one' and said it would initially use Nvidia GPUs, with compute power equivalent to an Nvidia GB300 rack, before eventually transitioning to radiation-hardened chips from Terafab, a planned ~10-million-square-foot semiconductor fab being developed with Tesla and Intel. To manufacture these satellites at scale, SpaceX is building the Gigasat facility in Bastrop, Texas — an 11-million-square-foot campus covering over 1,000 acres that will produce solar components, printed circuit boards, communications hardware, and the satellites themselves, with a target of 1 GW of annual orbital AI compute capacity by end of 2027. Sources familiar with investor presentations told Reuters that SpaceX executives, including President Gwynne Shotwell and CFO Bret Johnsen, outlined plans to launch demonstration missions by late 2027, ahead of the 'as early as 2028' commercial deployment timeline in the IPO filing, with the earlier date providing management buffer for potential Starship delays. SpaceX, which is seeking a $75 billion fundraise at $135 per share on Nasdaq under ticker SPCX, justifies its $1.75 trillion valuation by citing a total addressable market of $28.5 trillion, of which AI accounts for $26.5 trillion. However, IEEE Spectrum's analysis from ABI Research finds that the cost to launch and operate a GPU in space for a year is at least an order of magnitude higher than in a terrestrial data center, citing the Stefan-Boltzmann law's brutal implications for radiative cooling — a single 32-GPU rack requires roughly 80 square meters of radiator surface, growing by 40% over a satellite's five-year lifespan due to radiation degradation — alongside the risks posed by ionizing radiation to commercial-grade chips like the H100.