NASA to resume ISS spacewalks in 2025 after spacesuit leak

an astronaut sideways in a spacesuit gazing at the camera, during a spacewalk
European Space Agency (ESA) astronaut Matthias Maurer, as seen from the helmet cam worn by NASA astronaut Raja Chari during a spacewalk on March 23, 2022. Maurer and Chari were using extravehicular mobility unit (EMU) spacesuits. (Image credit: NASA TV)

NASA plans to resume spacewalks on the space station in 2025 after a leaky spacesuit suspended those activities in June.

"We are planning our next set ... early next year," Bill Spetch, operations and integration manager of NASA’s International Space Station (ISS) program, said of spacewalks during a press conference Oct. 25 following the conclusion of SpaceX's Crew-8 mission to the orbiting complex.

A seal and umbilical connecting the spacesuit to the ISS was replaced, and the affected suit repressurized with success, he added. "It's just a matter of when is the right timing," Spetch said, noting that spacewalks are scheduled in between spacecraft arrivals and departures, as well as astronaut research activities.

NASA suspended all ISS spacewalks with its spacesuit indefinitely after agency astronaut Tracy Dyson experienced a brief coolant leak June 24 before leaving the hatch of the space station. (Russia, the other majority space station partner, uses an independent set of spacesuits known as Orlan.)

Related: NASA delays ISS spacewalks indefinitely to investigate spacesuit coolant leak

Dyson and fellow NASA astronaut Mike Barratt opened the door for what was expected to be a 6.5-hour spacewalk focused on maintenance. Minutes later, however, ice particles erupted from a spacesuit connection to the ISS.

The astronauts were never in any danger, NASA has said, nor were the spacewalk tasks needed immediately.

tracy dyson inside a spacesuit and looking off screen

NASA astronaut Tracy Dyson is pictured in her spacesuit prior to the start of a June 24, 2024 spacewalk that ended after just 31 minutes due to a coolant leak from a suit umbilical. (Image credit: NASA)

"We'll go look for the next opportunity for where we want to do the spacewalk. It's not time-critical or urgent, and so we'll find the best, logical place to put it," station program manager Dana Weigel, of NASA, told reporters in a teleconference on July 17.

Dyson's suit was one of NASA's extravehicular mobility units (EMU) first designed in the 1970s and used during the space shuttle program in the 1980s. The suit has a long flight heritage, including helping to build the ISS and service the Hubble Space Telescope.

Parts of the EMU can be swapped out as needed, but the suit design nevertheless has had a few coolant leaks in recent years. For example, NASA suspended spacewalks for seven months in March 2022 after water was discovered in a spacesuit helmet. A more notable incident in July 2013 saw Italian astronaut Luca Parmitano's helmet fill with water while he was spacewalking, necessitating an investigation and remedies.

NASA is asking private industry to contribute new spacesuits for several programs, including low Earth orbit activities. The EMU is biased toward larger and male sizes given that it was designed half a century ago, when male astronauts (drawn from the male-dominated military) made up NASA's corps.

Collins Aerospace was expected to deliver newer ISS suits, but withdrew from its contract in June because its anticipated timeline "would not support the space station's schedule and NASA's mission objectives." At that time, NASA confirmed the contract would end, but did not announce its next steps.

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Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for Space.com for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: https://qoto.org/@howellspace