On May 26, NASA astronaut Jeff Williams spent seven hours inflating the first expandable room at the International Space Station. Called Bigelow Expandable Activity Module or BEAM, the balloon-like structure that measures 10-feet by 13-feet, (about the size of an average bedroom), when fully inflated, is the first prototype of what NASA experts hope will be the space habitat of the future. The compressed module arrived at the ISS aboard the SpaceX Dragon spacecraft on April 8 and was put in place outside the Tranquility module by ISS’s robotic arm, Canadarm2.