The ascending node is also called north Moon Node, or Dragonís Head; while the descending node is called south Moon node or Dragonís Tail. According to Indian mythology, they are named Rahu and Ketu.
The meaning of the Moon axis is associated with karmic astrology. The starting point is that we are not on the earth for the first time, but we have gathered experiences from past lives. The principle of reincarnation is illustrated by the Moon axis, due to the fact that the descending node refers to our past, while the ascending node shows our future, as well as the most important message we should learn in our current life.
All our past experiences remain in the south node, which is commonly associated with issues that are familiar to us. It represents habits that we do not want to quit because of easiness, that is, the south node symbolizes the way of less resistance. However, the main goal is to overcome ourselves and acquire new experiences, which can turn out to be completely opposed to the previous ones, just the way it is represented by the sign and the house containing the north Moon node.