ИСТИНА

The nature and origin of a unique formation, which is still conditionally called the South Pole – Aitken basin, remain one of the most important problems in recent studies of the Moon. The basin, which apparently belongs to the pre-Imbrian Period, is the largest ring formation not only on the lunar surface but also in the entire Solar System. Not only the basin dimensions on the absolute scale but also the fact that the basin diameter almost coincides with the lunar diameter are of interest. A similar relationship is not observed on other silicate or icy bodies in the Solar System. It was preliminarily estimated that this structure originated about 4 Ga ago.