Christina Koch and Jessica Meir floated feet-first out of the International Space Station's (ISS) Quest airlock on Friday lunchtime United Kingdom time, tasked with replacing a failed power control unit.
The first such mission was supposed to take place in March but was canceled because the space agency had only one medium-sized suit, with a male-female combination performing the required task at a later date.
Becoming a multi-millionaire entrepreneur by the age of 32 might be enough for most people, but in September 2006 Anousheh Ansari also became not only the first Iranian-born astronaut in space but also the first ever female private space explorer.
"There are a lot of people who derive motivation from inspiring stories from people who look like them, and I think that it's an important aspect of the story to tell", she said at a NASA briefing in Houston this month.
Ms Koch is going to remain in space for an extended duration mission of 11 months, which will set a new record for longest single spaceflight by a woman. "It's wonderful to be contributing to human spaceflight at a time when all contributions are being accepted, when everyone has a role and that can lead, in turn, to increased chance for success".
Other women who've conducted spacewalks since 1984 include Kathryn Thornton, Linda Godwin, Tammy Jernigan, Nicole Stott, Tracy Caldwell Dyson, Kate Rubins, Susan Helms, Peggy Whitson, Heide Stefanyshyn-Piper, Sunita Williams, and Anne McClain. But the failure of the power unit changed those plans. She is the 15th woman to complete a spacewalk.
Ever since Russian cosmonaut Alexei Leonov became the first person to exit a spacecraft in space in 1965, men have egressed out of the hatch for all 420 spacewalks. The broken battery charge-discharge unit regulates the charge to the batteries that collect and distribute solar power to the orbiting lab's systems, according to NASA.
"There have been many other female spacewalkers before us".
U.S. astronauts Christina Koch and Jessica Meir became the first all-female who went to the outer space simultaneously to replace the burn-out external power controller on the International Space Station.
Koch and another USA astronaut, Anne McClain, were initially scheduled to make the first all-female spacewalk back in March.
Once the unit is replaced, postponed spacewalks to replace the batteries can be rescheduled.
Trump wasn't the only dignitary in Washington, D.C., to celebrate NASA's all-woman spacewalk. -Swedish citizenship, making her the first Swedish woman in space. "Safety of the crew and execution of the mission come first".
They then returned to the airlock with the failed part which will subsequently be loaded on to the next SpaceX Dragon resupply ship for inspection on Earth.
As the first female commander of the International Space Station, Peggy Whitson also holds another slightly daunting record - nearly 666 days in space, the longest length for any woman.