For decades, the Space Force and the Air Force before it have had a tried-and-true method: massive, costly satellites are sent into orbit by launches that have been planned for months. Once there, those satellites mostly stay put in their orbits, preserving as much fuel as possible because, once that fuel is gone, the spacecraft’s service life is over. Now the Space Force is rethinking that formula, investing to build large constellations of much smaller satellites. “Resilience” is the priority. But USSF and industry leaders are also adding another watchword to their operations: “dynamic.”