The astronaut who returned to the station he once knew

PromISSe launches into orbit from Baikonur cosmodrome, Kazakhstan. · 3:14 · Video: European Space Agency, ESA · Watch at the source

In short: When André Kuipers launched for his PromISSe mission, he described it as returning to a home that had doubled in size. Beyond the nostalgia, his journey marked a pivotal shift in how we utilize the International Space Station for science.

In December 2011, ESA astronaut André Kuipers launched from the Baikonur Cosmodrome in Kazakhstan aboard a Soyuz spacecraft. Marking a major achievement for European space exploration, the PromISSe mission represented the initial extended stay for a European astronaut after the Shuttle programme ended in July 2012. Kuipers, a medical doctor, joined a six-astronaut crew as a flight engineer for Expeditions 30 and 31, alongside Russian cosmonaut Oleg Kononen and NASA astronaut Don Pettit.

The mission highlighted the transition of the International Space Station from an assembly project to a fully operational laboratory. During his previous 11-day Delta mission in April 2004, the station consisted of only four main modules: Zarya, Unity, Destiny, and Zvezda. By the time of the PromISSe mission, the station had expanded significantly, allowing for a shift in focus from construction to intensive scientific research. Kuipers participated in approximately 30 ESA experiments, including studies on bone loss countermeasures, radiation environments, and fluid physics.

The scientific workload was substantial, with Kuipers conducting around 40 hours of experiments per week. Much of this work took place in the European Columbus laboratory. His research, which included studying the effects of weightlessness on the human body, was designed to provide critical data for future deep-space endeavors, such as the Artemis program and eventual missions to Mars. This era of the ISS focused on maximizing the station's utility to bring the benefits of space technology and education back to Earth.

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