All four on board donned SpaceX's new spacewalking suits to protect themselves from the harsh vacuum. They launched on Tuesday from Florida, rocketing farther from Earth than anyone since NASA's moonwalkers. The orbit was reduced by half—to 460 miles (740 kilometers)—for the spacewalk.

This first spacewalking test, expected to last close to two hours, involved more stretching than walking. Isaacman kept a hand or foot attached to it the whole time as he flexed his arms and legs to see how the new spacesuit held up. The hatch sported a walker-like structure for extra support.

After about 15 minutes outside, Isaacman was replaced by SpaceX engineer Sarah Gillis to go through the same motions. Gillis bobbed up and down in weightlessness, no higher than her knees out of the capsule, as she twisted her arms and sent reports back to Mission Control.

Each had 12-foot (3.6-meter) tethers but did not unfurl them or dangle at the end unlike what happens at the International Space Station, where astronauts routinely float out to do repairs at a much lower orbit.

More and more wealthy passengers are plunking down huge sums for rides aboard private rockets to experience a few minutes of weightlessness. Other have spent tens of millions to stay in space for days or even weeks. Space experts and risk analysts say it's inevitable that some will seek the thrill of spacewalking, deemed one of the most dangerous parts of spaceflight after launch and reentry but also the most soul-stirring.

This operation was planned down to the minute with little room for error. Trying out new spacesuits from a spacecraft new to spacewalking added to the risk. So did the fact that the entire capsule was exposed to the vacuum of space.

There were a few glitches. Isaacman had to manually pull the hatch open instead of pushing a button on board. Before heading out, Gillis reported seeing bulges in the hatch seal.

Scott "Kidd" Poteet, a former Air Force Thunderbird pilot, and SpaceX engineer Anna Menon stayed strapped to their seats to monitor from inside. All four underwent intensive training before the trip.

Isaacman, 41, CEO and founder of the Shift4 credit card-processing company, has declined to disclose how much he invested in the flight. It was the first of three flights in a program he's dubbed Polaris; this one was called Polaris Dawn. For SpaceX's inaugural private flight in 2021, he took up contest winners and a cancer survivor.

Until Thursday, only 263 people had conducted a spacewalk, representing 12 countries. The Soviet Union's Alexei Leonov kicked it off in 1965, followed a few months later by NASA's Ed White.

© 2024 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.

Read more from original source...