AUBURN, Wash. — A pair of space tugs are beginning their journey from Spaceflight Inc.’s clean room, south of Seattle, to low Earth orbit. Along the way, the Sherpa orbital transportation vehicles and their 36 ride-along spacecraft will be loaded up on a SpaceX Falcon 9 rocket and fired off from Cape Canaveral Space Force Station in Florida as early as this month. Spaceflight’s Sherpa vehicles are pioneering a relatively recent innovation in the satellite launch industry. Such space tugs can go