ISS experiment shows microbes might survive interplanetary trips

A new study reveals that microscopic organisms like fungi and bacteria can survive in outer and might survive interplanetary trips. According to study, published in journal Frontiers in Microbiology, experiments conducted on microbes found that y can survive dam from UV riation in . experiments were reportedly conducted at Exposure Facility of Japanese Experimental Module (JEM) of International Station (ISS) during Tanpopo mission. final samples were exposed for a total of 1,126 days and returned to Earth in 2018. samples from 1 to 3 years were n analysed by scientists. 

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results of experiment that was conducted by Japanese ncy, who h attached dried cell pellets of rioresistant bacteria Deicoccus spp to International Station (ISS), support that microbes could survive vacuum of and also suggest possibility of interplanetary transfer of microbes within several years. ISS experiment came after scientists proposed sub-millimeter cell pellets (aggregates) could survive in harsh environment based on an on-ground laboratory experiment.

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Microbes might survive trips from Earth to Mars

Previously, each exposure experiment was performed independently for only one time period. In Tanpopo mission, by contrast, experiments with different exposure periods at same place were conducted. Thus, researchers were able to plot survival fractions after 1, 2, and 3 years of exposure to obtain time course. By analyzing time course, it is also possible to estimate survival for longer periods. cell pellets with a thickness greater than 0.5 mm are expected to survive between 15 and 45 years of exposure to UV on ISS EF and 48 years exposure to in dark, more than sufficient for an interplanetary mission between Earth and Mars.

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