NASA’s Perseverance rover has spent 1,645 Martian days exposing swatches of spacesuit material to the atmosphere on Mars, providing researchers with vital data about how dust interacts with future exploration gear, Universe Today reported.
Using the Planetary Instrument for X-ray Lithochemistry (PIXL), researchers measured dust particles as small as 100 to 200 nanometers on the rover. The Daily Galaxy noted that glass targets accumulated dust averaging 140 nanometers, while Teflon samples collected particles averaging 300 nanometers.
Vectran fabric trapped larger grains averaging around 2 micrometers between its woven threads. The analysis confirmed that these microscopic grains carry perchlorates, sulfur, iron, and silica.
Unlike the jagged, sharp regolith encountered during the Apollo lunar missions, Martian dust particles are exceptionally smooth. BBC Sky at Night Magazine reported that billions of years of wind erosion have worn down the rough edges, leaving the particles resembling pebbles on a beach.
While the smoother particles cause less visible wear on materials and reduced mechanical abrasion compared to moondust, their tiny scale presents distinct physiological risks. Ultrafine particles entering a pressurized habitat can bypass natural respiratory defenses and penetrate deep into human lungs.
The electrostatic charge of Martian dust causes it to cling stubbornly to surfaces and fabrics. Scott VanBommel of Washington University in St. Louis emphasized that while dust continues to hinder operations, proper engineering and preparation can manage the risk.
VanBommel said that dust will be a challenge, but it is something we can prepare for and overcome.
Mission planners must account for these toxic ultrafine grains when designing habitat air filtration systems and spacesuit airlocks. The complete findings from the study are detailed in recent research published in PNAS.
