But they are not even the only spheres out there. Some of them are a lot closer to the ground (approximately or even under 50 feet), and they are on the contrary a lot smaller – only about 20 inches. Those are less numerous than the bigger ones, but they can be just 30 feet apart, while the bigger ones have to be 200 feet apart. What is sure is that no matter their size, all these spheres are part of a regulated and organised system that you might not know about if you do not work in this industry. You can try to guess it, but we guess you will not be able to find the answer!
