LRO-LAMP Detects Helium

NASA Lunar Reconnaissance Orbiter LAMP (Lyman Alpha Mapping Project) Spectrometer Sensed Noble Gas Helium For The First Time, Say Scientists From SWRI; Principal Investigator Alan Stern Points To Bigger Question Of Whether Helium Comes From Interior Source Such As Radioactive Decay Or From Solar Wind; 1972 Apollo 17 LACE (Lunar Atmosphere Composition Experiment) In Situ Measurements Agree With Findings / Point To Future Search For Argon

Image Credit: NASA, NASA Goddard/Debbie McCallum