The International Space Station (ISS) is about to operate with a much smaller crew. On January 8, NASA announced that four astronauts from SpaceX’s Crew-11 mission will return to Earth due to a health issue affecting one of them. The exact timing for their departure will be clarified soon.
With the Crew-11 members leaving, the ISS will have just three astronauts left: NASA’s Christopher Williams and two from Roscosmos, Sergey Kud-Sverchkov and Sergei Mikayev. This change marks a significant shift, as the ISS has had a normal crew size of seven since 2020, while the previous baseline was six, established in 2009. Before that, a three-person crew was the standard for nearly ten years.
Williams will be the only astronaut on the American section of the ISS after the Crew-11 departure. Luckily, NASA is confident in his abilities. “Chris is trained for everything we need him to do,” said NASA Associate Administrator Amit Kshatriya. He also mentioned that there’s a large support team back on Earth ready to assist.
The presence of Kud-Sverchkov and Mikayev also adds reassurance. They trained closely with Williams and can help operate U.S. systems if necessary. Kshatriya praised their teamwork and noted their qualifications to assist under the guidance of mission control.
Operating with a skeleton crew will affect the ISS’s activities. Less scientific work will be done, and NASA won’t be able to conduct spacewalks, which require two astronauts. This makes the station more vulnerable to issues like hardware malfunctions, a point highlighted by former astronaut Chris Hadfield.
The health issue arose just before a planned spacewalk that was to involve Crew-11’s Mike Fincke and Zena Cardman. NASA has not disclosed which astronaut is affected but has assured that the situation is unrelated to the canceled spacewalk. The goal is to bring the affected astronaut back home for advanced medical assessment.
Crew-11’s journey to the ISS began on August 2, and they were supposed to remain until the arrival of Crew-12, scheduled for mid-February. There is hope that the launch could be moved up, but the timeline for the remaining astronauts is still uncertain.
As space exploration continues to evolve, shifts like this remind us of the historical challenges faced by astronauts. In the early days of the ISS, smaller crews were common. Today, as technology improves and agencies collaborate, these adjustments highlight the ongoing complexity of maintaining human presence in space.
For more insights on space missions and crew dynamics, you can check NASA’s official website. As we await further updates, the ISS remains a fascinating testament to human resilience and teamwork in extreme conditions.

