title: Extralunar sources for carbon on the moon.
mesh_terms: D001128:Argon / Q000032:analysis; D055580:Astronomical Phenomena; D001256:Astronomy; D002244:Carbon / Q000032:analysis; D002247:Carbon Isotopes / Q000032:analysis; D005118:Extraterrestrial Environment; D055593:Geological Phenomena; D005844:Geology; D006371:Helium / Q000032:analysis; D007726:Krypton / Q000032:analysis; D009356:Neon / Q000032:analysis; D011868:Radioisotopes / Q000032:analysis; D013026:Space Flight; D014887:Weather; D014978:Xenon / Q000032:analysis
chemical_list: D002247:Carbon Isotopes; D011868:Radioisotopes; D006371:Helium; D014978:Xenon; D009356:Neon; D007726:Krypton; D001128:Argon; D002244:Carbon