All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder
The Moon's seemingly benign surface hides a nasty secret: its dust caused "lunar hay fever" in all Apollo astronauts and is surprisingly toxic. This piece delves into the abrasive, lung-damaging nature of lunar regolith, posing significant challenges for future lunar missions. Hacker News readers are captivated by this blend of historical anecdotes, space exploration hurdles, and the deep dive into material science, sparking comparisons to other planetary dangers and discussions on engineering solutions.
The Lowdown
All twelve Apollo astronauts who walked on the Moon experienced a condition dubbed "lunar hay fever," characterized by symptoms like sneezing, nasal congestion, and eye irritation from the pervasive lunar dust. They famously described the dust's smell as burnt gunpowder, an early hint at its unusual properties. This article explores the scientific reasons behind this phenomenon and the potential health risks posed by lunar dust for future long-duration missions.
- Lunar dust is composed of sharp, abrasive silicate particles, similar to volcanic ash on Earth, which is known to cause lung inflammation and scarring (silicosis) in miners.
- Unlike Earth dust, which is smoothed by erosion, lunar dust retains its jagged edges due to the lack of atmosphere and water, making it highly damaging.
- Its fine particles, 50 times smaller than a human hair, can stay suspended longer in the Moon's low gravity, allowing them to penetrate deep into the lungs and remain there for months.
- Research using lunar soil simulants has indicated that long-term exposure can damage lung and brain cells.
- The Moon's constant bombardment by solar radiation causes the dust to become electrostatically charged, leading to levitation and increased difficulty in containment, further enhancing its ability to infiltrate equipment and human respiratory systems.
- The European Space Agency (ESA) is actively researching these challenges, using volcanic simulants and exploring potential solutions like using lunar soil to produce bricks for shelter or extracting oxygen from it. This "toxic side of the Moon" presents a critical obstacle for establishing sustainable human outposts, necessitating robust protective measures and innovative material science to safeguard astronaut health and equipment.
The Gossip
Dusty Dangers & Design Decisions
Commenters acknowledge the inherent dangers of lunar dust, noting its sharp, abrasive nature and potential to damage both human health and equipment. The discussion also touches on engineering solutions to mitigate these risks, such as space suit designs that prevent dust ingress into habitats and methods for processing regolith into safer materials.
Martian Misgivings & Venusian Visions
The discussion quickly broadens beyond the Moon, drawing parallels and contrasts with the environmental challenges of Mars and Venus. Commenters highlight the toxic perchlorates on Mars and the acidic atmosphere of Venus, weighing the different colonization difficulties each body presents and discussing potential solutions like specialized habitats or terraforming.
Health Hazards & Historical Hindsight
Concerns arise about the long-term health implications for the Apollo astronauts, specifically whether their brief exposure to lunar dust could lead to cancer, likened to "space asbestos." While noting the small sample size and the time elapsed, some commenters discuss the known latency periods for asbestos-related illnesses and factors like astronaut fitness that might influence outcomes.