Lunar Landing Exhaust May Threaten Ancient Polar Ice Deposits

Future crewed missions to the Moon under the Artemis programme could unintentionally destroy critical chemical evidence linked to the origins of life on Earth. Researchers warn that exhaust gases from lunar landers may pollute ancient ice deposits located in permanently shadowed craters near the Moon's south pole, which have remained undisturbed for billions of years. This ice is considered a repository for organic molecules delivered by comets and asteroids during the early history of the solar system.

Unlike Earth, where geological processes have altered the planetary record, the Moon preserves chemical evidence from the early solar system. Computer simulations indicate that methane, a byproduct of rocket exhaust, can travel in ballistic 'hops' across the lunar surface due to the lack of an atmosphere. These emissions are projected to migrate toward polar regions within a lunar week, potentially contaminating the very deposits scientists intend to study for prebiotic organic building blocks.

The potential for irreversible contamination poses a significant challenge for ongoing lunar exploration efforts. As international space agencies move forward with long-term lunar bases, the necessity for landing protocols that protect these scientifically invaluable regions becomes paramount. Experts urge a careful evaluation of landing sites and exhaust management to ensure the preservation of these historical chemical records for future generations of scientific analysis.