Super Pressure Balloon

Forty days at float as of Saturday, June 25, and NASA's super pressure balloon (SPB) is presently flying above the south Pacific as it continues on its long-duration technology test and science flight. For the past two weeks, the balloon has etched out a whimsical groundtrack over the Pacific, slipping out of the more southerly …

While the Compton Spectrometer and Imager (COSI) gazes into space, another experiment is listening for whispers from the Earth itself. Housed in two humble white boxes tucked behind COSI's solar panel, a triad of microphones are recording infrasound – sound too deep for humans to hear. Infrasound sources include volcanoes, earthquakes, ocean waves, the aurora, …