The European Space Agency baked its 35-meter [1] ExoMars parachute in a specialized dry-heat sterilizer oven to meet strict planetary-protection requirements.
This process is critical to prevent forward contamination, ensuring that Earth-based microbes do not hitchhike to Mars and compromise the search for indigenous life. If terrestrial bacteria were to contaminate the Martian soil, they could create false positives in future biological experiments.
ESA’s Mars chief engineer Albert Haldemann said the parachute was processed at a clean-room facility in Europe. The baking process is designed to reduce microbial contamination by at least 10,000-fold [2], a level of cleanliness that is at least 10,000 times cleaner than a typical smartphone [2].
The parachute, which appears as a large donut-shaped object when folded, must withstand the extreme environment of the Martian atmosphere. The use of the dry-heat sterilizer ensures the material remains structurally sound while removing biological pollutants. This step is a mandatory part of the planetary-protection rules that govern all missions landing on Mars.
Images and video of the process were released on May 1, 2026 [3]. The facility uses these specialized ovens to ensure that every component of the landing system is stripped of organic contaminants before the craft leaves Earth.
By adhering to these standards, the agency minimizes the risk of introducing invasive species to another planet. This rigorous cleaning protocol is applied to the entire ExoMars landing assembly to maintain the integrity of the scientific mission.
“The 35-meter ExoMars parachute was baked in a specialized dry-heat sterilizer oven.”
The sterilization of the ExoMars parachute highlights the stringent requirements of planetary protection. By eliminating Earth-based microbes, ESA ensures that any organic molecules or biological signatures discovered on Mars are truly extraterrestrial and not the result of terrestrial contamination, preserving the scientific validity of the mission's findings.
