Plane change — The Falcon 9 rocket is pretty much the only rocket available to launch this mission. Enlarge / Artist's illustration of the COSI spacecraft. A small research satellite designed to study the violent processes behind the creation and destruction of chemical elements will launch on a SpaceX Falcon 9 rocket in 2027, NASA announced Tuesday. The Compton Spectrometer and Imager (COSI) mission features a gamma-ray telescope that will scan the sky to study gamma-rays emitted by the expl...