When you're building one of the world's most advanced jet fighters, there's no room for error. Engineering technology used by BAE Systems, a partner in the F-35 joint strike fighter program and the manufacturer of Typhoons, even takes the moon's gravitational pull into account. The moon causes the ground to shift by one to two millimeters every time it pulls the oceans' tides in and out. And this tiny movement can throw off the precise alignment of an aircraft's frame as pieces are put together. "That might not sound a lot, but given the tolerances we are working to on...