The SpaceX Polaris Dawn mission, which made history when its crew conducted the first spacewalk by non-government astronauts, splashed down off the coast of Florida early yesterday.
The Dragon spacecraft landed in the ocean at 3.37pm (HK time), a webcast of the splashdown showed, with a recovery team deploying in the pre-dawn darkness to retrieve the capsule and crew.
The four-member team led by fintech billionaire Jared Isaacman launched last Tuesday from the Kennedy Space Center, quickly journeying deeper into the cosmos than any humans in the past half century as they ventured into the dangerous Van Allen radiation belt.
They hit a peak altitude of 1,400 kilometers - more than three times higher than the International Space Station and the furthest humans had ever traveled from Earth since the Apollo missions to the Moon.
Then two days later last Thursday, with their spacecraft's orbit brought down to about 700 kilometers, 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.
"Back at home we all have a lot of work to do, but from here, Earth sure looks like a perfect world," he told mission control.
Since Dragon doesn't have an airlock, the entire crew were exposed to the vacuum of space.
It marked a "giant leap forward" for the commercial space industry, said NASA, as well as another triumphant achievement for SpaceX.
Though the company was only founded in 2002, it has outpaced its legacy competitors thanks in large part to founder Elon Musk's vast fortune and zeal to begin the colonization of Mars.
Since completing their extravehicular activity, the crew have continued to carry out roughly 40 science experiments, including demonstrating connectivity with SpaceX's Starlink internet satellite constellation by sending back to ground control a high-resolution video of Gillis playing "Rey's Theme" by Star Wars composer John Williams, on the violin.
Polaris Dawn is the first of three missions under the Polaris program, a collaboration between Isaacman and SpaceX.
Agence France-Presse
The capsule splashes down in the Gulf of Mexico. AP
Jared Isaacman reacts as he exits the capsule. AP