Four astronauts from the Crew-11 mission left the International Space Station prematurely and returned to Earth this Thursday morning, in an operation described by NASA as the first medical evacuation in the history of the orbital laboratory in operation since 2000. This decision, which brings the crew back several weeks earlier than planned, was made due to a health problem affecting one of the team members.
Aboard a SpaceX Crew Dragon capsule, the astronauts splashed down safely off the coast of California near San Diego, after a descent of approximately 10 hours from the International Space Station. They had originally joined the ISS on August 1, 2025, for a mission of about six months, which was scheduled to end in mid-February 2026 during the following rotation, Crew-12.
Details of the medical problems kept secret
NASA has issued numerous reassuring messages regarding the situation. Shortly before the station's departure, Rob Navias, head of flight operations at the American agency, stated that "The crew member was and remains in stable condition."While clarifying that the operation was not an emergency evacuation, space authorities refused to disclose the astronaut's identity or the exact nature of the health problem, citing medical confidentiality.
NASA's chief medical officer, James PolkHe explained last week that the decision to bring the crew back earlier was motivated by the existence of a "persistent risk" et "uncertainty regarding the diagnosis"justifying the need for more comprehensive examinations to be carried out on the ground.
The astronauts want to reassure everyone.
Before their departure, the mission pilot Mike fincke had sought to calm concerns on social media by emphasizing that "We are all fine" and that the decision aimed to allow for appropriate medical examinations on Earth, where all diagnostic capabilities are available. He had described this decision as "bittersweet".
During a live broadcast on Monday, the crew members appeared smiling during a change of command ceremony aboard the ISS, an ordinary moment in the life of the station.
The mission schedule has been disrupted.
This medical evacuation also disrupted the schedule of activities on board: an extravehicular activity planned for January 8 had been postponed due to the initial health problem.
NASA and its international partners must now ensure the continuity of operations aboard the ISS with a reduced staff until the arrival of the Crew-12 crew, whose launch was scheduled for mid-February but could be brought forward to avoid a staff gap.
