List of microorganisms tested in outer space
The survival of some microorganisms exposed to outer space has been studied using both simulated facilities and low Earth orbit exposures. A large number of microorganisms have been selected for exposure experiments, as listed in the table below.
It is possible to classify these microorganisms into two groups, the human-borne, and the extremophiles. Studying the human-borne microorganisms is significant for human welfare and future manned missions in space, whilst the extremophiles are vital for studying the physiological requirements of survival in space.[1] NASA has pointed out that normal adults have ten times as many microbial cells as human cells in their bodies.[2] They are also nearly everywhere in the environment, and although normally invisible can form slimy biofilms.[2]
Extremophiles have adapted to live in some of the most extreme environments on Earth. This includes hypersaline lakes, arid regions, deep sea, acidic sites, cold and dry polar regions and permafrost.[3] The existence of extremophiles has led to the speculation that microorganisms could survive the harsh conditions of extraterrestrial environments and be used as model organisms to understand the fate of biological systems in these environments. The focus of many of the experiments has been to investigate the possible survival of organisms inside rocks (lithopanspermia),[1] or their survival on Mars for understanding the likelihood of past or present life on that planet.[1] Because of their ubiquity and resistance to spacecraft decontamination, bacterial spores are considered likely potential forward contaminants on robotic missions to Mars. Measuring the resistance of such organisms to space conditions can be applied to develop adequate decontamination procedures.[4]
Research and testing of microorganisms in outer space could eventually be applied for directed panspermia or terraforming.
Table

See also
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- Misc
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References
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- ↑ 1.0 1.1 1.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 NASA – Spaceflight Alters Bacterial Social Networks (2013)
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- ↑ 11.0 11.1 11.2 11.3 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 25.0 25.1 25.2 25.3 25.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ BOSS on EXPOSE-R2-Comparative Investigations on Biofilm and Planktonic cells of Deinococcus geothermalis as Mission Preparation Tests. EPSC Abstracts. Vol. 8, EPSC2013-930, 2013. European Planetary Science Congress 2013.
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- ↑ 37.0 37.1 37.2 37.3 37.4 37.5 37.6 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Extreme Halophiles Are Models for Astrobiology. Shiladitya DasSarma, American Society for Microbiology.
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- ↑ Pasini D. L. S. et al. LPSC44, 1497. (2013).
- ↑ 54.0 54.1 Pasini D. L. S. et. al. EPSC2013, 396. (2013).
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- ↑ Viability of the lichen Xanthoria elegans and its symbionts after 18 months of space exposure and simulated Mars conditions on the ISS. International Journal of Astrobiology International Journal of Astrobiology doi:10.1017/S1473550414000214 July 2014.
- ↑ Horneck G., et al. (2008) Astrobiology, 8, 17.
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- ↑ Pasini D. L. S. et al. LPSC45, 1789. (2014).
- ↑ Pasini D. L. S. et. al. EPSC2014, 67. (2014).
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