NASA Orders Early Return of Crew-11 from Space Station

NASA has announced a controlled medical evacuation from the International Space Station (ISS), prompting the early return of four out of seven astronauts. This decision follows a “medical situation” experienced by one crew member earlier this week. While NASA has provided limited details regarding the incident, officials confirmed that the affected astronaut is stable and the agency is prioritizing caution in their response.

The astronaut involved is part of the Crew-11 mission, which launched on August 1, 2023, and was originally scheduled to return to Earth around February 20, 2024. Instead, the Crew-11 team will undock from the ISS in the coming days and complete their journey with a parachute-assisted splashdown in the Pacific Ocean off the coast of California.

Jared Isaacman, NASA Administrator, stated, “After discussions with our chief health and medical officer, Dr. JD Polk, and leadership across the agency, I’ve come to the decision that it’s in the best interests of our astronauts to return Crew-11 ahead of their planned departure.” The Crew-11 mission is commanded by Zena Cardman, who is completing her first mission, alongside experienced astronaut Mike Fincke, Kimiya Yui from Japan, and Russian cosmonaut Oleg Platonov.

NASA plans to release further details about the timeline for the Crew-11 crew’s return within the next 48 hours. They will return aboard the same SpaceX Crew Dragon spacecraft that transported them to the station. The spacecraft serves as a lifeboat, necessitating the entire crew to return together.

Dr. James “JD” Polk, NASA’s chief health and medical officer, emphasized that the astronaut is “absolutely stable,” but acknowledged some lingering risks associated with the medical issue, which remains undisclosed due to privacy concerns. “I’m not going to speak about any particular astronaut or any particular specific diagnosis,” Polk stated, urging respect for the astronaut’s privacy.

The incident occurred just before Cardman and Fincke were scheduled to conduct a spacewalk. While the pre-spacewalk preparations include breathing high concentrations of oxygen to mitigate decompression sickness, Polk clarified that the medical situation was “totally unrelated to any operations onboard.” He noted that the issue arose in the challenging microgravity environment rather than during routine spacewalk preparations.

On Wednesday afternoon, Yui requested a private medical conference with mission control, which led to NASA temporarily removing the audio feed of the conversation from public access. Later that day, NASA confirmed a medical concern and began considering an early return for the astronauts.

Polk highlighted the importance of the crew’s training, stating, “The crew is highly trained, and they came to the aid of their colleague right away, and that’s part of why we do that training.” The ISS is equipped with medical supplies that allow astronauts to respond to emergencies, with capabilities akin to those of an emergency medical technician.

NASA will take several days to finalize the departure date for the Dragon spacecraft, while SpaceX prepares a recovery ship to be positioned for the splashdown. Medical personnel will be present during the recovery to assess the astronauts post-landing. Polk reassured that this is not an emergent evacuation; however, he acknowledged the risks associated with keeping the astronaut in orbit without a confirmed diagnosis.

This decision marks a significant moment in Isaacman’s tenure as NASA administrator, a role he assumed just last month following a Senate confirmation vote. Before leading NASA, he was known as an entrepreneur and private astronaut, having flown to space twice on commercial missions with SpaceX.

Once Crew-11 departs, the ISS will operate with a reduced crew of three until the arrival of the Crew-12 mission, currently scheduled for February 15, 2024. The remaining crew will consist of NASA astronaut Chris Williams and two Russian cosmonauts who arrived in November. Williams and his colleagues have their own means of return via a Russian Soyuz spacecraft, ensuring safety in case of emergencies.

Historically, the ISS has rarely operated with fewer than four crew members since it has been continuously staffed since 2000. This early departure will limit NASA’s ability to conduct spacewalks and could elevate risks in responding to potential hardware failures.

This incident is unprecedented for NASA, as it is the first instance of a controlled medical evacuation from the ISS. The agency has previously dealt with medical situations in space, but this is the first time a crewed mission has been cut short for medical reasons. The experience gained from this situation will inform future operations, including potential missions to the Moon and Mars.

Isaacman asserted, “We will absolutely learn from this situation as well, to see if that informs our future on-orbit operations, whether that be on the space station or our future lunar base that we’re pursuing right now, and eventually for deep space missions to Mars.”