ИСТИНА

Large amounts of water ice can be delivered to the Moon by 3-5 km asteroids and O-rich short-period comets. Such comets and asteroids can deliver to the lunar poles also CO2 and SO2 ices as well as H2, CO, and H2S. C-rich comets are main source of hydrocarbons at the poles of the Moon while low-speed cometary impacts are able to deliver complex organic species, methanol, and ammonia to the lunar poles. There are Ca, Mg, and Na in the form of metals in the illuminated lunar polar regions. Strongest annual meteor showers are responsible for temporal increase of OH and Na content in the lunar exosphere and at the regolith’s surface.