Tiny Meteoroid Rain Threatens Future Moon Base
- * Micrometeoroid Bombardment: The Moon experiences a constant bombardment of micrometeoroids (tiny rock adn metal fragments) traveling up to 70 kilometers per second.
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* Micrometeoroid Bombardment: The Moon experiences a constant bombardment of micrometeoroids (tiny rock adn metal fragments) traveling up to 70 kilometers per second.
* Impact Rate: A lunar base the size of the International Space Station could expect between 15,000 and 23,000 impacts per year.
* Particle Size & energy: Even tiny particles (one microgram - invisible to the naked eye) strike with enough energy to damage metal and equipment.
* Lack of Protection: The Moon has no atmosphere to protect it from thes impacts; every micrometeoroid makes contact.
* Location Matters: Impact rates vary across the lunar surface.
* lowest Rates: Lunar poles (good news for the Artemis base location).
* Highest Rates: Near the sub-Earth longitude (the side perpetually facing Earth).
* Variation: Impact rates vary by a factor of roughly 1.6 across the lunar surface.
* Cause of Variation: The Moon’s orbit and relationship with earth and the Sun create shielding effects in some areas.
* Artemis Program: Understanding this bombardment is critical for the safety of future astronauts establishing a permanent lunar base as part of NASA’s Artemis program.
* Research: A new analysis led by Daniel Yahalomi used NASA’s Meteoroid Engineering Model to quantify the impact rates.
* micrometeorite Composition: Most micrometeorites are silicate-rich (“stony MMs”). (See image caption for detailed classifications).