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Keywords:

  • Moon;
  • atmosphere

[1] The LAMP far ultraviolet spectrograph aboard the NASA Lunar Reconnaissance Orbiter has been used in 2011 to search for helium, the lightest noble gas in the tenuous lunar atmosphere. Based on that search, we report here the first detection of lunar atmospheric He by remote sensing, and point to future observations that can address questions about its source; we also discuss a search for lunar atmospheric argon.