The surface of the International Space Station can be a temporary custodian of a biomaterial of extraterrestrial origin. This was reported by the press service of Roskosmos.
This probability was established during the space experiment "Test" by specialists of the branch scientific institute TsNIIMash. Also, scientists noted that the station is a universal tool for exobiological research. Space experiment "Test" is conducted since 2010. In its framework, the astronauts collected 19 dust samples from the surface of the ISS when they came to the surface of the station. It is noted that for the first time in history, the possibility of regular delivery of samples of fine sediment from the station surface in the natural state was realized. This, in turn, made it possible to obtain multiple and operative data on the chemical and biological composition of cosmic dust. Laboratory studies confirmed the presence on the surface of the MCS of the fine precipitate of the meteoroid substance. Unlike those falling on the surface of the Earth, micrometeorites and cometary dust on the ISS can contain organic biogenic substances, since they are not burned when flying through the atmosphere. Specialists can distinguish microorganisms of terrestrial origin, which accidentally hit the surface of the ISS, from extraterrestrial. However, this is a difficult task and work is under way on its solution.