I started writing these notes because I could feel something shifting under a field I had spent years working in — Earth observation — and I couldn’t find a single text that named what was happening.
For most of human history, the planet was unqueryable. We crossed oceans with primitive instruments, mapped fragments of land by walking it, and tracked weather through intuition and memory. Civilization evolved around delayed awareness. Information arrived months late, sometimes years late, and reality changed faster than we could read it.
Then, quietly, the planet began surrounding itself with sensors. Satellites became smaller; launch costs collapsed; storage became cheap; AI learned to reason over imagery, telemetry, and time. What emerged is not a better satellite industry. It is a planetary nervous system — and we still don’t quite have the words for it.
These notes are my attempt to draw the map of that shift. Not the technology itself, but the change in mental model. Earth observation is becoming the substrate of a planetary intelligence stack. Foundation models will reason about the planet the way they now reason about language. Compute will follow the data into orbit. The interface, eventually, becomes intent.
It is organized as a single argument across thirteen chapters, in four parts. Each chapter stands on its own; together they trace the shape of what is coming.
Wander as you like.
Ravi Suhag