WHITE PAPER Ice Prospecting: Your Guide to Getting Rich on the Moon Version 1.0 // May 2019 // This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License. Kevin M. Cannon (
[email protected]) Introduction Water ice has been detected indirectly and directly within permanently shadowed regions (PSRs) at both poles of the Moon. This ice is stable against sublimation on billion-year timescales, and represents an attractive target for mining to produce oxygen and hydrogen for propellant, and water and oxygen for human life support. However, the mere presence of ice at the poles does not provide much information: Where is it exactly? How much is there? Is it thick layers of pure ice, or small amounts mixed in the soil? How hard is it to excavate? This white paper attempts to offer answers to these questions based on interpretations of the best data currently available. New prospecting missions in the future–particularly landers and Figure 1. Ice accumulation mechanisms. rovers–will continue to change and improve our understanding of ice on the Moon. This guide will be updated on an ongoing expected to be old. (2) Solar wind. The solar wind is a stream of basis to incorporate new findings. electrons, protons and other particles that are constantly colliding with the unprotected surface of the Moon. This Why is there ice on the Moon? process can create individual OH and H2O molecules that are Two factors create conditions that allow ice to accumulate able to ballistically hop across the surface, eventually migrating and persist at the lunar poles: (1) the Moon has a very small axial to the PSRs.