Researchers from NASA and the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, report that streams of meteoroids striking the Moon infuse the thin lunar atmosphere with a short-lived water vapor.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/meteoroidstr.jpg)
Source:
https://phys.org/news/2019-04-meteoroid-eject-precious-moon.html