Potential NASA Commercial Applications: Recently, the Moon has been discovered to harbor large amounts of H2O ice. This ice is interesting for many reasons ranging from the practical to the scientific. The origin of this ice is unknown but there are seven sources that have been postulated: The Sun, the Earth, the Moon itself, comet impacts, asteroid impacts, interplanetary dust, and giant interstellar molecular clouds. Since each of these proposed sources have significantly differing isotopic values, high-precision measurements of water isotopes will help elucidate the origin and subsequent evolution of the lunar ice. Other potential NASA missions would also benefit from the proposed analyzer, including the Mars Mission, Europa-Jupiter System Mission, and Comet Sample Return Mission.