
Los Angeles Startup General Galactic Aims to Brew Rocket Fuel From Water—And Test It This Year
Los Angeles startup General Galactic, founded by former SpaceX propulsion engineer Halen Mattison, plans to test a water‑to‑methane propellant system in space this fall. Its Genesis-1 pilot plant already produces 200 liters of methane daily from CO₂ and water. If successful, the modular reactor would replace the “yada yada” of lunar ice mining with on‑demand fuel synthesis—and rewrite the economics of Mars round trips.














