The spacewalk, the riskiest part of the five-day Polaris Dawn mission, kicked off at 6:12 AM ET when oxygen started flowing into the astronauts' spacesuits.
In the history of human spaceflight, spacewalks have only ever been performed by government astronauts, who use them as an opportunity to do repairs, perform maintenance, or to conduct scientific experiments.
Isaacman and Gillis performed a series of movements to test the suits' mobility and performance during their less than ten minutes outside the spacecraft.
Jared Isaacman, the mission leader, noted, 'Back at home, we all have a lot of work to do, but from here - looks like a perfect world.'
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