The Planets- Rahu & Ketu

Rahu has smoke like blue body, lives in forests and is horrible. He is windy in temperament and is intelligent. Like Rahu is Ketu.

Myth:
Lord Vishnu was dispensing amrita (divine nectar) amongst the gods. A demon, Rahu, was hiding himself and imbibing the drink without Lord Vishnu's knowledge. The Sun and the Moon discovered him and alerted Lord Vishnu. Vishnu threw his discus, cutting off the head of Rahu, but he had already swallowed the nectar and was now immortal. Therefore, there remained an immortal head called Rahu and an immortal body called Ketu.
Significations of Rahu:
Foreignness, strangeness, that which is unfamiliar. Rahu and Ketu form the army of the planetary cabinet. Ketu is the "flag" and Rahu is the marching troops. Therefore, Ketu represents that which is already conquered and Rahu represents that which is to be conquered. Other significations of Rahu are: Maternal grandmother, paternal grandfather, multicolored clothes, outcastes, lead, impulse, disillusionment, compulsions, obsessions, immaturity, insanity, fear from the unknown, worldly desires, separation, crime, drugs, extreme changes, upheavals.
Significations of Ketu:
Innate talents, intense scrutiny, dissatisfaction, doubt, fear from past experiences, mystical experiences, occult knowledge, asceticism, intrigues, enlightenment, worldly indifference, maternal grandfather, paternal grandmother. Ketu, as being the "flag", represents what we have already conquered and become very familiar with. The saying "familiarity breeds contempt" comes directly from Ketu as Ketu makes us contemptuous of all that is substantive.