Rahu and Ketu are also known as the Chhayya Graha (shadow planets). It is the name given to the nodes of the moon. Rahu represents the North Node and Ketu, the South Node. According to Hindu Mythology these planets represents the Serpent. They represent the darker side of our nature which we need to overcome.
Rahu is a planet of materialism and gives material gains in a particular area. If well placed it gives happiness, wealth and a powerful position. But it also gives mental anxieties. If the position of Rahu is not well placed then it could result to loss of position, legal hassles and misfortune.
Ketu, on the other hand, will deprive a person of the benefits of the house it is transiting and force a person to think on a higher plane. It can result in turning the mind inwards to seek the ultimate truth. If the position of Ketu is not well placed then it could lead to depression, confusion and even misunderstandings in your relationships.
Rahu will transit into sign LEO and Ketu will transit into sign Aquarius on 31 January 2016 and this major transit will impact the career, finance, stability and all aspects of life.