Researchers have developed a liquid-nitrogen spray that rids spacesuits of lunar dust.
Ever since Neil Armstrong took one small step onto the moon, lunar dust has proved to be a messy problem for astronauts, coating their spacesuits in a powdery film that's difficult to clean off and can be unhealthy if inhaled. However, scientists have come up with a novel solution that could ultimately leave this problem in, well, the dust.
They found that spraying the spacesuit-clad dolls with liquid nitrogen not only removed more than 98% of the moon dust substitute but also caused little to no damage to the Kevlar-like suit material. This proved to be a better solution than older methods; Apollo program astronauts would use brushes to swipe the highly abrasive material from their suits post-moonwalk, which would ultimately degrade the material, according to the team's new study, published online Feb.
The liquid-nitrogen experiment worked thanks to a phenomenon known as the Leidenfrost effect, which occurs when water hits a surface that's hotter than its boiling point, causing the droplet to"skitter across the surface." Or, in this case, the liquid nitrogen blasted the moon dust substitute almost completely off the Barbies' spacesuits.—Never-before-seen crystals found in perfectly preserved meteorite dust
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