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Has sea plankton been discovered on the ISS outer hull
by Staff Writers
Moscow (Voice of Russia) Aug 22, 2014


File image.

Russian scientists say they made a "unique" discovery while analyzing samples from the exterior of the International Space Station - traces of tiny sea creatures on the station's windows and walls. It remains unclear how marine plankton ended up in space.

The results of the recent experiments prove that that some organisms are capable of living on the outer surface of the International Space Station (ISS), Vladimir Solovyev, head of the Russian segment of the ISS, has revealed.

Some studies suggest that these organisms may even develop in the hostile conditions of spaceflight, which include vacuum, low temperatures, radiation and others, he added.

"The results of the so-called 'Test' experiment are unique. On the surface of the [ISS] windows we found traces of marine plankton - the microparticles - that will become the subject of further studies," Solovyev was quoted as saying by Itar-Tass.

While the experiments on the matter were finalized last year, it is still unclear how the microparticles could get all the way to the ISS, Solovyev said.

"[Plankton in] such phases of development is found on the surface of the ocean. It isn't characteristic to Baikonur,"he explained, referring to Baikonur Cosmodrome in Kazakhstan from where crew and cargo deliveries to ISS are launched.

"It turns out that there are some rising air currents, which settle on the surface of the station," Solovyev added.

The former cosmonaut, who spent nearly a year in orbit back in the 1980s, said that outer surface of ISS is "heavily contaminated" by the waste products from engines of the arriving spacecraft, atmospheric discharges from the station during spacewalks by the crew and other factors.

"We are currently conducting special operations to be able to somehow to polish and clean up the windows [at the ISS]. This is especially important during long space flights," Solovyev concluded.

The assembly of the International Space Station began in 1998. Since then it has spent nearly 6,000 days in Earth orbit.

Russia says it has no plans to continue its partnership in the station after 2020, while the US segment of the station is financed until 2024.

Russian space agency Roscosmos has proposed using the ISS to commission modules for a new space station, called OPSEK (Orbital Piloted Assembly and Experiment Complex).

Source: Voice Of Russia

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