On October 18, 2019, Christina Koch and Jessica Meir carried out the first spacewalk with an all-woman team. The milestone was historic, and the assignment was practical: help restore part of the International Space Station’s power system.
A repair outside the station
NASA’s account of the spacewalk describes the replacement of a battery charge-discharge unit. The equipment helps manage electricity associated with the station’s batteries, supporting operations when the orbiting laboratory passes out of sunlight.
Spacewalks require more than reaching the faulty component. Astronauts need suitable tools, carefully planned movements and coordination with people inside the station and on the ground. The work is a team effort even when only two crew members appear in the photographs.
NASA announced the milestone as the astronauts began their work. Their suits switched to battery power at 7:38 a.m. Eastern Daylight Time, marking the official start. The contemporary account recorded Meir coming through the hatch with a tool bag at 7:49 a.m. A planned five-and-a-half-hour outing became a longer operation, allowing additional tasks after the main repair; the completed duration was seven hours and seventeen minutes.
The suit-fit decision earlier in 2019
An earlier all-woman assignment changed in March 2019. Anne McClain learned during her first spacewalk that a medium hard upper torso fitted her best. NASA explained on March 25 that only one medium torso could be ready for March 29, so Christina Koch wore it and Nick Hague took McClain's place on that outing. This was a change to the crew assignment; the maintenance spacewalk itself still went ahead.
At the October milestone, NASA official Ken Bowersox expressed the hope that women working together outside the station would become routine. His discussion of spacesuit design also underlined why usable fit matters. The 2019 article linked NASA's spacesuit facts and cited a suit's Earth weight of about 280 pounds. Apparent weightlessness in orbit does not remove that mass or its inertia, so handling the equipment still takes effort. Spacewalks demand physical endurance and sustained concentration as well as a workable suit; astronauts quoted in the 2019 coverage compared one to taking an exam while running a marathon.
What “first” means here
This was the first all-woman spacewalking team, not the first time a woman had worked outside a spacecraft. NASA’s historical account notes that Svetlana Savitskaya performed a spacewalk in July 1984; Kathryn Sullivan became the first American woman to do so later that year.
Keeping that distinction preserves both achievements. It also avoids making earlier women disappear from the story in the excitement around a newer milestone.
Koch and Meir belonged to NASA's 2013 astronaut class, the first selected with equal numbers of women and men. At the completion of the October 2019 outing, Meir became the fifteenth woman to have performed a spacewalk. These are historical counts associated with that event, rather than present-day totals.
NASA's FY2017 employment report, cited in contemporary coverage, recorded women as 34.2% of the total workforce and 28.1% of the Senior Executive Service. It also reported a 16% share across the combined Senior Level and Senior Scientific and Professional positions. Those historical figures formed part of the discussion in 2019 about representation beyond the astronaut corps; they should not be read as a current workforce survey.
Remember the work as well as the photograph
A useful way to revisit the event is to ask what the astronauts accomplished, why the hardware mattered and how their training supported the operation. The historical significance grows clearer when the task remains visible.
Life aboard the station also depends on less photogenic systems. The engineering of space toilets shows how everyday needs shape spacecraft design, while experiments involving tardigrades and squid illustrate the station’s role as a research laboratory.
More images
Video and reactions from October 2019
NASA TV broadcast the spacewalk live. The 2019 article also collected reactions from Girl Scouts, the International Space Station, Valerie Jarrett, Andrew Morgan and LEGO. Representative Katherine Clark wrote: “One giant leap for WOMANkind!”
Christina Koch's accompanying October 15 post predates the all-woman outing: its reference to a spacewalk “last Friday” concerns her earlier work outside the station. The dates remain visible in the posts below.
3, 2, 1…blast off! Here's to making history and two more female role models girls everywhere can look up to! 👩🚀🙌Thank you, @Astro_Christina and @Astro_Jessica! @Space_Station #AllWomanSpacewalk #GirlScouts pic.twitter.com/pU8yMIa97Y
— Girl Scouts (@girlscouts) October 18, 2019
Friday, October 18 marks a historic day: The first ever all-female #spacewalk! Want to share congratulations or words of encouragement for @Astro_Jessica or @Astro_Christina? Send us a photo with your well-wishes and we might send it to the crew or air it on our live broadcast! pic.twitter.com/zpreFMNJnR
— Intl. Space Station (@Space_Station) October 17, 2019
Little girls growing up today will think this historic event is perfectly normal. #AllWomanSpacewalk . https://t.co/qp70XtYSz3
— Valerie Jarrett (@ValerieJarrett) October 18, 2019
Curb appeal. It’s not often I get to see my house from the outside. This photo I snapped on my spacewalk last Friday captures the habitable modules that I have called home for the last eight months. Pretty lucky to be living inside an engineering marvel. pic.twitter.com/djbnCstXfN
— Christina H Koch (@Astro_Christina) October 15, 2019
So proud of my astrosisters @Astro_Christina and @Astro_Jessica! We’ve been training together since our selection in 2013, and now they’re out on a history-making spacewalk! #AllWomanSpacewalk pic.twitter.com/zjMGDJ5tae
— Andrew Morgan (@AstroDrewMorgan) October 18, 2019
(This post is no longer available on X.)
Shout-out to the crew of the first all-female spacewalk. In space or behind the scenes - you are all amazing! 👩🚀 🙌 @Astro_Christina @Astro_Jessica #WomenInSpace pic.twitter.com/tFpWF7MpCp
— LEGO (@LEGO_Group) October 18, 2019
Image credits: NASA, Astro_Jessica and Intl. Space Station.
The repair had a measurable outcome
NASA's report issued when the spacewalk ended records a duration of seven hours and seventeen minutes. Koch and Meir replaced the failed battery charge-discharge unit, rather than simply inspecting it. The agency explains that the component regulates charging for batteries involved in collecting and distributing the station's solar electricity. The completed task is worth keeping beside the historical milestone: a real piece of infrastructure needed repair, and the crew performed it.
A planned duration and a completed duration are different facts. The earlier coverage described a shorter schedule; the final operational report records what actually happened. When revisiting mission news, the report after an activity can therefore answer questions that the announcement before it could only anticipate. That distinction also applies to a launch, a docking or an experiment scheduled aboard the station.
Christina Koch's route through engineering and field science
NASA's biography of Koch describes degrees in electrical engineering and physics, followed by work on scientific instruments for cosmology and astrophysics at Goddard Space Flight Center. Her experience also included remote field engineering: a winter at the South Pole, work elsewhere in Antarctica and Greenland, and assignments with NOAA. These are concrete parts of her professional history, not simply a list of adventurous places.
Instrument development asks an engineer to make equipment work for a scientific purpose. Remote field assignments place practical demands on keeping that equipment functioning. Those experiences offer a useful way to understand the breadth of preparation behind an astronaut portrait. They do not mean that a previous job automatically qualified someone for a particular repair; astronaut selection and subsequent training are separate stages.
Jessica Meir's research examined life in extreme conditions
Meir's NASA biography records a doctorate in marine biology and research on the diving physiology of emperor penguins and elephant seals. Her later work included studying bar-headed geese in reduced-oxygen conditions. Before selection as an astronaut, she worked with Lockheed Martin on human-physiology research and participated in reduced-gravity flights and an underwater NASA analog mission.
Her astronaut training then covered station systems, spacewalks, robotics and survival skills, among other subjects. The change from studying animals to operating spacecraft can seem surprising, but the biography makes the intervening training visible. It is a reminder that the crew's shared operational qualification did not require identical earlier careers.
Three dates to keep separate in an archive
The spacewalk took place on October 18, 2019. A photograph shared a few days earlier can show preparations or a different spacewalk; a social-media post published afterward can be a reaction. Preserve those dates when discussing the images so that a celebration of the event does not accidentally turn every accompanying photograph into a record of the same moment.
Before the October 2019 spacewalk, administrator Jim Bridenstine connected the milestone with the then-announced ambition to send the “next man and the first woman” to the Moon by 2024. NASA's October 17, 2019 advisory records that target. Artemis, named for Apollo's twin sister in Greek mythology, was the program associated with that ambition. The 2024 date is a historical announcement, not a statement that a landing happened that year or a current schedule. Koch's own extended station mission, described as forthcoming in the 2019 coverage, subsequently totaled 328 days, as recorded in her NASA biography; the 2019 report noted that this would be the longest stay in space by a woman.
The Moon goal moved on, and Koch went with it. The landing did not happen in 2024, but Artemis II launched on 1 April 2026 with Reid Wiseman, Victor Glover, Christina Koch and Canada’s Jeremy Hansen, flew around the Moon and splashed down on 10 April. Fortune reported that the flyby made Koch the first woman to travel around the Moon. A crewed landing, including the first woman on the lunar surface, remains a goal for later Artemis missions.
Separate the milestone from the maintenance task
A useful way to describe this event is to keep two questions in view. What made the crew assignment historic? What work did the astronauts actually perform? The first concerns participation in human spaceflight; the second concerns maintaining the station's electrical system. Neither answer replaces the other. A headline can celebrate the milestone while the article still explains the hardware and the purpose of the repair.
For a classroom discussion, try writing two captions for the same mission photograph: one about the people and one about the task. Then combine their strongest details into a single caption. This makes the history more concrete without reducing the astronauts to a symbolic first or overlooking the practical work that brought them outside.
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