Since Boeing and SpaceX will begin sending NASA astronauts into orbit next year, the International Space Station is going to need a place for them to park. Astronauts Jeff Williams and Kate Rubins will journey outside the ISS on Friday to install a new docking adapter for these two private companies. Popular Mechanics reports: "Installing these adapters is a necessary step in NASA's Commercial Crew Program, which seeks to spur development of commercial crew spacecraft. The spacewalk is scheduled to begin at 8:05 a.m. on Friday, and live coverage will start at 6:30. This will be Williams' fourth spacewalk, and Rubins' first." In the meantime, you can watch this video describing exactly what the spacewalk will entail.