Constellation Space builds an AI operating system for mega-scale satellite networks, developing autonomous infrastructure for scaling satellite constellations. Its ConstellationOS offers predictive thermal load-balancing, zero-intervention network handoffs, and sub-second optical routing, and is designed for satellite mission assurance. The founding team has built and operated satellite systems at SpaceX, Blue Origin, and NASA. The company is part of Y Combinator's Winter 2026 batch.