The Galaxy Journal

Orbital Computing: Space-Based Data Centers, Math and Money

Orbital Computing: Space-Based Data Centers, Math and Money

Everyone's arguing whether data centers belong in orbit. This piece actually runs the numbers — Stefan-Boltzmann radiator math, four independent physics checks (Google, JPL, an aerospace engineer's public calculator, Scott Manley), and a hard look at whether SpaceX, Google, and Starcloud can beat Earth's prices. Spoiler: not yet, and here's exactly what has to change first.

July 11, 2026