Six hours before history’s largest rocket, tall as a forty-story building, is set to blaze across the South Texas sky at supersonic speeds, a host of pilgrims has already arrived. These intrepid space geeks have made their way to Rocket Ranch, a campsite seventeen miles outside Brownsville, from as far away as England, Germany, and Australia. Most paid $200 for the opportunity to watch the launch of SpaceX’s Starship flight ten from as close as safely possible.About a hundred spectators are expected to be on hand at the Ranch, in the late-August heat, once the final countdown begins. The early arrivals take special advantage of access to the house on the premises. A handful are lounging in the living room, enjoying the air-conditioning, filching coffee,…