COSI

NASA’s Compton Spectrometer and Imager (COSI) is a planned wide-field soft gamma-ray telescope that will study the origins of galactic antimatter, the formation of elements, and high-energy transients across the Milky Way and beyond. The mission is led by principal investigator John Tomsick at the University of California, Berkeley. Its telescope builds on detector and instrument technology developed and tested through a series of scientific balloon flights, including a 2016 NASA super-pressure-balloon flight. Berkeley’s Space Sciences Laboratory contributes engineering, operations and research alongside a multi-institution team.