Google’s Space Technology Experiment
The inaugural “Suncatcher” datacenter satellite from Google has successfully ascended into space, yet the tech powerhouse remains somewhat uncertain about the potential longevity of their orbital aspirations. As GadgetLad reported last week, Project Suncatcher focuses on determining whether Google’s tensor processing units (TPUs) can endure the journey and the harsh environment of space. The Big G believes that the seemingly limitless solar energy available in space might justify the expenses of launching servers there.
Obstacles of Orbital Data Centers
In their extensive announcement regarding a successful launch, Google referenced its own peer-reviewed research—impressive, right? This research outlines the numerous complicated challenges that must be addressed to make these space-based data centers fully operational. The paper, grandly named “Toward a future space-based, highly scalable AI infrastructure system design,” notes that companies like SpaceX have indicated these space data centers could become feasible once launch costs fall to $200/kg.
Expenditure vs. Launch Potential
Google’s intelligent team also highlighted that SpaceX has reduced launch expenses by 20% each time they double the weight they’ve previously lifted. If SpaceX maintains this trend by launching an impressive additional 370,000 tonnes, or approximately 1,800 successful missions with their large Starship rockets, and reusing components a hundred times, Google considers the $200/kg price “reasonable under favorable assumptions.”
Cost Comparisons
Google is uncertain about the weight of their upcoming space data center satellites, but they are using Starlink’s second-generation models, which tip the scales at 575kg. They then contrast the expenses of launching into space with the costs of running servers on our familiar Earth. According to Google, should those launch expenses fall below $200/kg, the yearly cost per power unit in space could start to align with what we pay for terrestrial systems.
Additional Technical Challenges
Currently, the necessary components for data centers in orbit are predominantly still theoretical concepts. The study indicates that existing networking technology may not be adequate to connect multiple satellites into effective clusters. The speedy communication required among these satellites suggests that Google’s plans necessitate a design “significantly larger and involve much closer formation flying … than any previous or current satellite constellations.”
Advancing Satellite Design
Google also believes satellite design must evolve. “Our system design efforts thus far presuppose a relatively traditional, separate compute payload, satellite bus, thermal radiator, and solar panel architecture,” the paper states. “However, as observed in other sectors (like smartphones), massively scaled production fosters highly integrated designs (such as the system on chip, or SoC). Eventually, large-scale space-based computing will require a combined compute, radiator, and power system based on next-generation architectures, like computational substrates grounded in neural cellular automata.”
Communication Obstacles
Google’s experts also discovered that “resilient optical satellite-ground communications will be vital for scaled operations,” but this entails surmounting obstacles such as atmospheric disturbances, high-speed relative motion inaccuracies, and precise beam alignment. NASA’s TeraByte Infrared Delivery (TBIRD) initiative, which demonstrated 200 Gbps ground-to-low-earth-orbit communications, is seen as a promising way forward.
Research and Development Required
Consequently, Google’s researchers have determined that transforming these space data center aspirations into actuality “will necessitate ongoing research, iterative enhancements of our design, and the accomplishment of several key future benchmarks.”
Conclusion
Is the Sky the Limit?
Google has made a significant stride with their Suncatcher data center, but similar to my Jack Russell attempting to snatch a frisbee in the breeze, there’s still much to figure out. These lofty goals require exceptional teamwork and some time for everything to align perfectly.
