The orbit of the Moon crosses the path of the Sun in two places (Northern and Southern hemisphere) and these points are called the Nodes of the Moon.
The North Node (head of the Dragon) is an indicator of our life lessons and challenges representing our Karmic objectives and soul growth and evolution.
The South Node (tail of the Dragon) represents our comfort zone and reflects life challenges we have overcome and Karmic lessons we have learnt in past lives. Therefore our South Node reveals how we are equipped to face the Karmic objectives of our current life.
The placement of the Nodes in our Birth Charts by zodiac sign and house, reveals the nature and area of life in which we need to develop and achieve our soul quest and conquer our Karmic challenges.