In the new study, the researchers calculated how much gas rose from the lavas that flowed from the lunar volcanoes. They determined that enough gases accumulated around the moon to form an atmosphere, and that this atmosphere grew faster than it could escape into space. 

LPI officials said that the findings may have big implications for future exploration of the moon, because it "quantifies a source of volatiles that may have been trapped from the atmosphere into cold, permanently shadowed regions near the lunar poles and, thus, may provide a source of ice suitable for a sustained lunar exploration program." 

The study was published online Sept. 25 in the journal Earth and Planetary Science Letters

Email Hanneke Weitering at hweitering@space.com or follow her @hannekescience. Follow us @SpacedotcomFacebook and Google+. Original article on Space.com.