Rest assured, the nearly 2,000-foot (600-meter) diameter circle with a pie-shaped wedge on one side and spokes on the other is no extraterrestrial footprint and it’s definitely no hoax. It’s NASA’s newest launch pad for launching the agency’s most advanced high-altitude, heavy-lift scientific balloon: the super pressure balloon.
Construction on the project began in earnest Feb. 28 to meet a balloon launch date that could be as early as March 25. By the time the project is complete, nearly 2,000 loads of gravel will be trucked in and compacted to form the pad
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