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Astronauts are Going to Test if There are Microbes on the Exterior of the Station

January 31, 2025
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Astronauts are Going to Test if There are Microbes on the Exterior of the Station
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On Thursday January thirtieth, astronauts Suni Williams and Butch Wilmore are doing a 6.5-hour spacewalk outdoors the Worldwide Area Station. Amongst different targets, they’ll be gathering floor samples from the station to research for the presence of microbes.

The ISS “floor swab” is a part of the ISS Exterior Microorganisms challenge. It was developed to know how microorganisms are transported by crew members to house. It additionally seeks to know what occurs to these “mini-critters” within the house atmosphere.

The “bugs” that the 2 astronauts carry again in for evaluation will come from areas on the house station close to life-support system vents. The thought is to determine if the station releases these microbes by way of the vents. Scientists additionally need to know the scale of the discharge inhabitants, and the place else they present up on the station.

The Microbes Experiment

Researchers search to know how microbes exist and thrive in house and planetary environments. In the intervening time, the very best analog for these is on the ISS, significantly its exterior. So, when microbes discover their manner out, individuals need to understand how lengthy they survive the radiation. Do fast temperature adjustments have an effect on them? What else occurs to them? Additionally, scientists need to know if microbes handle to breed and the way the atmosphere adjustments that.

Samples from the ISS floor get frozen in particular containers and ultimately get returned to Earth. As soon as within the lab, they’re analyzed utilizing culture-independent strategies akin to next-generation deoxyribonucleic acid (DNA) sequencing to measure microbial neighborhood. Practical pathways in these microbial communities are characterised by focusing on multi-gene evaluation. This strategy permits for a complete evaluation of the microbial range and metabolic perform with out cultivation. The samples collected at totally different areas or throughout totally different EVA alternatives permit investigators to map the microbial range of ISS exterior surfaces.

A member of the ISS External Microorganisms payload development team demonstrates removing a swab from the sampling caddy that is used by an astronaut during a spacewalk. A crew member uses the swabbing tool to collect microbes in samples from the exterior surface of the International Space Station at various locations. Results could inform preparations for future human exploration missions to the Moon and Mars. Credit: NASA.
A member of the ISS Exterior Microorganisms payload improvement group demonstrates eradicating a swab from the sampling caddy that’s utilized by an astronaut throughout a spacewalk. A crew member makes use of the swabbing instrument to gather microbes in samples from the outside floor of the Worldwide Area Station at numerous areas. Outcomes may inform preparations for future human exploration missions to the Moon and Mars. Credit score: NASA.

Why Take a look at for Microbes?

Whereas individuals have been flying to and from house for many years now, the scientific neighborhood nonetheless has important gaps in information about understanding how microbes get launched, how they thrive, and what their life cycles are in house. Particularly, the ISS sees many visiting automobiles every year, and astronauts transfer round freely inside. These actions probably enhance the microbe inhabitants each in and out.

Gathering microbes and analyzing them permits scientists to evaluate the kinds and numbers of microorganisms dwelling on the outer shell of a spacecraft. The bigger aim is to provide extra info underneath the rules of NASA’s coverage on Planetary Safety Necessities for Human Extraterrestrial missions. There are nonetheless many inquiries to be answered, together with: what are the appropriate ranges of microbial life? Which of them make it out by way of the vents? What are acceptable contamination charges? Whereas NASA has designed this mission to reply these and different questions, the Russian house company Roscosmos can also be making related investigations to pattern the Russian facet of the station. That resulted within the discovery of non-spore-forming micro organism rising on the outer pores and skin of the station.

The outcomes of microbe evaluation from this and different microorganism collections may have an effect on spacecraft design and spacesuit adjustments. This turns into doubly necessary when individuals enterprise out onto the floor of Mars, for instance. Whereas we see no direct proof of life there now, it could possibly be there and sure existed previously. Not solely will we need to keep away from contaminating astronauts with that life, we additionally need to keep away from (as a lot as attainable) bringing Earth life to Mars. This identical analysis has purposes in different fields, akin to agriculture and prescription drugs.

Information on the Area Stroll

This isn’t the primary time the ISS has been examined for exterior microbial life, and the long-term research is important. The deliberate sampling to be mission undertaken by Williams and Wilmore is formally known as Spacewalk 92 and will begin at 8 a.m. on January thirtieth. NASA will present reside protection of the stroll (check here for extra info), which can even conduct another upkeep on the station together with the sampling actions.

For Extra Data

Astronauts Set to Swab the Exterior of Station for Microbial Life
Space Station Research Explorer

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