Surviving Space: NASA’s Microbial Mission
NASA astronauts Tracy Dyson and Matt Dominick are preparing for an extraordinary spacewalk on Thursday. Their mission? To examine if microorganisms attached to the International Space Station’s exterior have survived the harsh conditions of outer space.
Extreme Conditions, Resilient Life
The exterior of the space station experiences severe temperature swings from 248°F to -148°F, along with intense solar radiation and the absence of an atmosphere. Despite these inhospitable conditions, scientists are intrigued by “extremophiles,” organisms capable of surviving such environments. Notable among them are tardigrades, tiny eight-legged creatures known to endure the rigors of space.
Evidence of Endurance
Previous experiments have shown that smaller bacteria and microorganisms can survive for years in these extreme conditions. This raises exciting possibilities about the potential for life on other parts of the solar system, such as Mars.
Recent Findings
Dyson and Dominick’s mission follows recent studies that reveal the resilience of space-dwelling microorganisms. A January study found spore-forming bacteria and fungi, placed on cotton wool attached to metal rods outside the ISS, survived two years in space. Researchers attribute their survival to dehydration and partial freeze-drying in the vacuum of near-Earth space.
A notable 2020 study by Japanese scientists discovered that Deinococcus radiodurans, a robust bacterium, survived three years in space.
The Bigger Picture
These findings provide strong evidence that microorganisms can endure extreme space conditions. Dyson and Dominick’s upcoming spacewalk is a crucial step in understanding how these life forms survive and what it means for our search for extraterrestrial life.