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The SpaceX Polaris Dawn mission, which made history when its crew conducted the first ever spacewalk by non-government astronauts, is returning to Earth on Sunday.
Then on Thursday, with their Dragon spacecraft’s orbit brought down to 434 miles, Isaacman swung open the hatch and climbed out into the void, gripping a structure called “Skywalker” as a breathtaking view of Earth unfolded before him. Since Dragon doesn’t have an airlock, the entire crew were exposed to the vacuum of space. Mission pilot Scott Poteet and SpaceX engineer Anna Menon remained strapped in throughout as they monitored vital support systems.
Since completing their extravehicular activity, the crew have continued to carry out roughly 40 science experiments — for example inserting endoscopic cameras through their noses and into their throats to image their airways and better understand the impact of long-duration space missions on human health.
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