For the very first time Elon Musk explains the "space data center plan" of @SpaceX in detail and its AI1 orbital AI data center satellite - and suddenly it looks so much closer than I thought.
He says "There’s not some magic necessary that doesn’t exist for AI satellites. As Ian said this is a lot of this is technology we’ve already made for the… we basically don’t think this is a super hard problem compared to things that we already do."
📌 Power and compute capacity:
- 150 kW peak power
- ~120 kW sustained/average compute power
- Roughly equivalent to one full NVIDIA GB300 (or upcoming Rubin) rack in a typical data-center operating envelope (~140 kW peak is possible but 120 kW average is more realistic for sustained workloads).
📌 Solar array:
- Assumed efficiency: 250 W/m² (expected to improve beyond this).
- Large, deployable solar panels (evolutions of the solar arrays already flying on Starlink V3 satellites).
📌 Radiators (thermal management):
- Double-sided design, oriented “knife-edge” to the Sun to minimize solar heating.
- Heat rejection: ~1,400 W/m² (expected to improve).
- Radiator panels are roughly the same size/scale as the Starlink V3 solar arrays (~70 m wingspan class).
📌 Design philosophy:
- Significantly simpler than a Starlink satellite — no massive phased-array antennas or complex communications hardware.
- Core elements: solar panels + radiators + compute chips + laser links.
- Larger overall than Starlink sats but described as “the easier one to design for.”
📌 Connectivity:
- ~1 terabit/s via inter-satellite laser links.
- Can mesh with the existing Starlink constellation or link directly to ground.
- Low latency: satellites planned for ~600–800 km altitude → light-travel time yields only ~6–8 ms round-trip (light travels ~300 km per millisecond).
📌 Deployment and operations:
- Launched by Starship (the only vehicle capable of the required millions-of-tons-to-orbit scale).
- Part of a future large constellation (potentially up to ~1 million satellites).
- Orbital data centers can be networked together or routed through Starlink for terrestrial users.
📌 Manufacturing and timeline:
- Production in Bastrop, Texas.
- Solar manufacturing facility already under construction.
- Dedicated AI satellite production building to follow.
- Reasonable-volume production targeted by end of next year (2027).
- Initial chips will use existing NVIDIA GB300/Rubin designs with SpaceX reference hardware; future scaling via a new “Terra Fab” chip factory (~100 million sq ft, 10× the size of Tesla Giga Texas).
📌 Scalability notes:
- Near-term goal: gigawatt-scale orbital AI compute.
- Longer-term: terawatt-scale and beyond, eventually using lunar mass drivers (electromagnetic rail-gun style) to launch photovoltaics and radiators from the Moon (no atmosphere + 1/6 g makes this feasible).
- Starship is expected to increase annual mass-to-orbit from today’s ~2,500 tons to millions of tons per year within a few years.
