Tech entrepreneur Jared Isaacman and his crew waited until their capsule was depressurized before popping open the hatch. Isaacman emerged first, joining a small elite group of spacewalkers who until now had included only professional astronauts from a dozen countries.

"Back at home, we all have a lot of work to do. But from here, it sure looks like a perfect world," said Isaacman.

The commercial spacewalk was the main focus of the five-day flight financed by Isaacman and Elon Musk's company, and the culmination of years of development geared toward settling Mars and other planets.