This research presents a comprehensive feasibility study for implementing a triple-redundant five-dimensional (5D) optical data storage system utilizing fused silica glass substrates, strategically positioned at the Earth–Sun Lagrange points (L1, L4, and L5) to ensure the permanent preservation of human civilization’s complete digital heritage. Contemporary archival paradigms face insurmountable limitations in longevity, energy efficiency, and scalability, rendering conventional magnetic and electronic media fundamentally inadequate for civilizational-scale preservation spanning geological timescales. We establish that femtosecond laser–inscribed nanogratings in fused silica offer unprecedented advantages: operational lifespans exceeding 10¹³ years under ambient conditions; immunity to electromagnetic interference and cosmic radiation; thermal stability from near absolute zero to 1000 °C; and the elimination of active maintenance cycles. Through rigorous quantitative analysis, we demonstrate that humanity’s entire digital sphere—approximately 200 zettabytes as of 2026—can be preserved using 400 million CD-sized glass discs, requiring merely three orbital facilities at Lagrange points, with a total volume equivalent to a single terrestrial building. Our economic modeling reveals that while initial capital expenditure remains substantial (estimated 1. 5 trillion at current costs), projected industrialization reducing costs to 1, 000 per terabyte yields a total cost of ownership 100× lower than tape-based solutions over 50-year horizons, with an effectively infinite cost advantage over millennial timescales. The proposed Global Interstellar Data Archive (GIDA) architecture incorporates autonomous robotic libraries, optical wireless communication at terabit-per-second rates, and self-describing archival formats ensuring interpretability across civilizational discontinuities. A revolutionary Emergency Broadcast Protocol enables the system to autonomously transmit survival knowledge via radio and television in the event of catastrophic infrastructure collapse. Most remarkably, the system includes an interactive Morse code query capability scalable to billions of simultaneous users through frequency-division multiplexing, allowing survivors with primitive radio equipment to ask questions and receive specific answers from the archive. Furthermore, the system provides complete specifications for evolving Morse code into binary data transfer protocols, enabling survivors to progressively rebuild the Internet from first principles—potentially reducing recovery timelines from centuries to mere decades. A continuous optical Morse beacon, readable with the naked eye, ensures knowledge accessibility even under complete technological regression to pre-industrial conditions. This work addresses not only technical implementation but also fundamental sociotechnical questions regarding preservation equity, institutional authority over collective memory, and humanity’s obligation to transmit knowledge across deep time. We conclude that space-based 5D glass storage represents the first technologically viable pathway toward creating a genuinely permanent external memory for human civilization.
Revista et al. (Sun,) studied this question.