The Nancy Grace Roman Space Telescope is a massive win for science — a repurposed spy satellite turned cosmic explorer, launched by SpaceX's Falcon Heavy on a million-mile journey. Roman will study dark matter, dark energy and hunt for exoplanets, and it can survey the entire Milky Way in a month, a task that would take Hubble a century. Turning a canceled intelligence program into a two-billion-galaxy observatory is exactly the kind of innovation worth celebrating.