According to the spacecraft NASA Lunar Reconnaissance Orbiter, about 22% of the surface of the lunar crater Shackleton, bred in the south polar region, formed by ice.
Despite the age of 3 billion years, the crater is surprisingly well preserved. On its bottom there are many small craters that may have arisen as a result of the same collision that created Shackleton.
His name this lunar crater was named after the explorer Ernest Shackleton. Its depth is about 3 km and 21 km in width. Location of the crater near the south pole and a slight tilt axis of the Moon resulted in the fact that inside the crater always cold and damp. However, earlier attempts of scientists to discover there the ice did not give any results.
Drafted by LRO map of the crater floor with unparalleled detail, as he uses a laser altimeter has a very high sensitivity to differences of heights, which correspond to the length of its wave, ie about one micron. It was also possible to measure the albedo of the material that lines the crater. Interestingly, it is far superior in brightness of its neighbors.
Experts from the Massachusetts Institute were very surprised to see that the walls of the crater Shelkton even brighter than its bottom. At first, this fact has caused confusion scientists: they thought that if the same is available in the crater ice, it should be at the bottom, which never look the sun’s rays. According to scientists, the upper slopes of billions of years would evaporate any ice.
After some thought, the researchers hypothesized moonquakes. According to them, a meteorite or gravitational influence of seismic tremors can exfoliate the surface of the old walls Shelktona and expose new, brighter material. Data obtained LRO, accurately indicates that ice is present not only on the bottom, but also on slopes lunar crater. So if you and build a base on the moon, the best place simply is not found.
According to the materials Sciencemagic.ru