Russia's lunar research is currently undergoing "Earth trials" before landing on the moon in 2019, a Russian delegation member connected with the development of the space vessel said at an airshow outside Paris on Friday.

"As of today, the main construction documentation has been started and the models for independent and complex trials have been prepared," the delegate said.

Russia plans to land a research vessel, called Luna-25 (Moon-25) on the moon's polar region instead of the equator, where all other landings have been centered.

Russian scientists decided to land the spacecraft on the south pole of the moon, as they consider it an area of particular interest.

The researchers plan to explore internal structure of the moon and the impact of the cosmic rays and electromagnetic radiation on the lunar surface, and to search for natural resources in the area.