Starcloud CEO Philip Johnston on Putting the First A.I. Data Center in Space

Starcloud, a Redmond, Washington-based company co-founded by Philip Johnston, has attained unicorn status with a $1.1 billion valuation, following a $170 million Series A funding round. The company successfully launched its Starcloud-1 satellite in November, carrying the first data-center-class Nvidia H100 GPU into low Earth orbit. Starcloud-1 has since demonstrated its capability by training a language model and running Google's Gemini in space. Investors include Nvidia, In-Q-Tel, Sequoia Capital, and Y Combinator. Johnston's vision centers on relocating AI infrastructure to space to leverage unlimited solar power and mitigate the enormous energy consumption of terrestrial AI data centers. Starcloud-1 currently handles edge computing workloads, and the company has applied to the Federal Communications Commission (FCC) for a constellation of up to 88,000 satellites, aiming to establish a 5-gigawatt orbital hypercluster. Future plans involve launching Starcloud-2 in October and Starcloud-3, a 200-kilowatt satellite, which Starcloud projects will make orbital data centers cost-competitive by mid-2028. However, the project faces considerable engineering hurdles, primarily heat dissipation in the vacuum of space, which occupies 70 percent of Starcloud's engineering team's efforts. Josep Miquel Jornet, a professor at Northeastern University, also raised concerns about potential interference with astronomical observations if gigawatts of infrared radiation are emitted from large-scale orbital constellations. Starcloud is part of a growing field, with other companies like SpaceX, Blue Origin (Project Sunrise), Google (Project Suncatcher), and Aetherflux also planning orbital data center constellations. Axiom Space has already deployed a data center node to the International Space Station. Ian Christensen of the Secure World Foundation highlighted significant regulatory risks, as current orbital safety standards are outdated for the proposed scale of these constellations, and the re-entry of numerous aluminum satellites could have unknown environmental impacts on the ozone layer. Despite these challenges and skepticism, Starcloud has successfully demonstrated functional AI compute hardware in orbit and continues to advance its technology with substantial investment.