Science on Orbit This NASA grant-funded exhibit begins with a model of NASA’s Payload Operations Integration Center, where scientists and engineers on Earth manage the complex science experiments astronauts conduct on the International Space Station. Next, tour mockups of two ISS modules containing 20 full-scale replica racks that illustrate the Environmental Control and Life Support System, the food astronauts consume and a sleeping berth, among other necessary aspects of life and work aboard the station. A connecting node contains a full-scale replica of the Cupola Observation Module, which provides ISS astronauts their view of space and the Earth below.