International Space Station: The Story of Leaks and Future Challenges for Human Habitation in Orbit

The United States Space Agency recently released a report highlighting the frequent leaks of the International Space Station (ISS), referring to this issue as one of the challenges facing humanity's continued presence in space. In the darkness of space and under the harsh and dangerous conditions beyond Earth's atmosphere, the only thing standing between an astronaut and certain death is the spacecraft that separates them from the external environment. However, recent investigations into the space station reveal a bitter and alarming reality: the ISS has been experiencing ongoing and repeated leaks for many years. According to Scientific American, the new report from the space agency identifies these leaks as one of the 'greatest safety hazards' for astronauts. The significance of this statement becomes clear when one considers that the most pressing concerns raised in recent months regarding space have been related to issues such as the uncertainty surrounding Boeing's Starliner spacecraft or the increasing number of satellites in low Earth orbit and their dangers to the space station or future generations of these orbital outposts. While air leaks in space may seem strange and dangerous to many of us, they are quite ordinary and routine for engineers and astronauts. Sandra Magnus, a former NASA engineer and astronaut, explains that 'when you are in the space station, things are like your everyday life; you are not worried about a car accident in your life, but you know it is something that happens every day.' The concerning reality is that the space station has been continuously facing the problem of air leaks from inside the spacecraft to space since it began operations and hosted astronauts. David Klaus, a professor of aerospace engineering, emphasizes in an interview with Scientific American that all spacecraft have leaks, but the space station is more scrutinized due to its unique position, and the amount of leakage has now increased compared to the past. At the same time, these leaks are not significant enough to pose a danger to the station and its occupants. According to Michael Kizarian, a professor of astronautical engineering at the University of Southern California, 'these leaks are like two small holes, and the amount is 3.7 pounds of atmosphere per day.' Finding and repairing leaks in the space station is very difficult due to its vastness and complex structure. A part of the station known as the Russian service module 'Zvezda,' dating back to 2000, has leaks that are hard to repair due to limited access to internal sections. However, astronauts have managed to reduce the flow of leaks by closing hatches and using rudimentary methods such as applying materials to the leak points. It may be hard to believe, but one of the most effective tools in space is strong adhesive tape. Concerns about the future of the station and its potential early efficiency are other worrying issues mentioned in the recent report. NASA and the Russian space agency have differing opinions on when these leaks will reach a dangerous level, necessitating a complete restriction of the working space inside the station. NASA hopes to keep the station operational until 2030, while Russia has only committed to cooperation until 2028. Another concern is the surrounding conditions and daily wear and tear that gradually impact the station. The station, whose first sections were launched into space in 1998, has faced issues such as exposure to cosmic radiation and solar heat over the years. According to Kizarian, the space station will eventually suffer from wear and tear due to constant mechanical pressures. However, the reality is that the International Space Station is now on the brink of permanent retirement. NASA recently signed a contract with SpaceX to develop a spacecraft for decommissioning the station and controlling the descent of its debris in 2031. A significant portion of the station's structure will likely be destroyed in a controlled descent into Earth's atmosphere, but if SpaceX can recover and safely bring back some of its parts, a major auction for these pieces by the world's leading museums will take place. NASA also plans to allow private companies to build new spacecraft and stations in low Earth orbit after the ISS is decommissioned. In this regard, NASA has allocated financial support to companies like Axiom Space and Blue Origin for the construction of commercial space stations. Axiom Space intends to add a new module to the station, which will be launched in 2026 and will operate as an independent base in space after the ISS's retirement. However, reports indicate that this company is facing financial difficulties, and no further details about the project's status have been announced. The risk of losing the International Space Station and not having a replacement by 2031 has raised concerns among NASA experts and planners. Magnus reminds us that if the United States wants to present itself as a leading country in space exploration, it needs to achieve this goal with a comprehensive and efficient program instead of 'scattered and stalled advancements.' Another concern that NASA and, in general, Western allies face relates to the fact that while Western space agencies are losing their only international space station, the next generation of these stations will be in the hands of private companies, China is quietly sending new generations of its space stations into orbit and developing them. China has announced that countries and private companies can use the space of these Chinese orbital laboratories for scientific research, but a significant aspect for Western space agencies is the potential to develop complex technologies that China can now advance globally without national competition. Ultimately, the issue of leaks in the International Space Station and its future problems is recognized as a symbol of the challenges of long-term human life in space and must be considered beyond Earth's orbit for journeys that humans may one day wish to undertake to more distant destinations like Mars or beyond.