According to Vedic Astrology, North Node of Moon is RAHU and South Node is KETU. Both RAHU and KETU are also called dark or shadow planets. These Nodes are connected with occurrence of eclipses. These Nodes do not follow any sign ruler ships. However, they favour Mercury and Jupiter's signs according to some authorities. Others claim that Rahu favours sign of Aquarius while Ketu sign of Scorpio. Rahu, North Node of Moon means to hide, cover up or swallow up in Sanskrit.
Rahu as Seen in Temples: This Graha is connected with the world of material appearance and experienced desire. Rahu is linked with spiritual process of evolution or the absorbing spirit in materialisation. Rahu is a karaka or indicator of worldly desire. Rahu is about fame, greed, high intelligence, manipulation, obsessive behavior and foreigners. Rahu might cause mass disease, dementia and inertia. The nature of this Graha is Vata or Airy. Rahu can cause one to be not religious, outcast who has harsh speech. Also, it can cause misleading notion, falsehood, and dirtiness. There might be illnesses namely abdominal ulcers, bones, and transmigration. Rahu is involved in reinforcement of one's power. It also helps in converting an enemy into a friend. Poisonous snake bites can be healed by the grace of Rahu. In Buddhism Rahu is one of the krodha Devas [terror-inspiring Gods].
Rahu Professions: Rahu is a celebrated master of deception. He shows people who cheat, seek pleasure, deals with drugs and poisons and work in foreign lands. Rahu denotes those who are insincere with immoral acts and others.
Rahu Diseases: Rahu causes suicidal tendencies, fears, phobias and poisonous bites. Also, Rahu might cause murder, theft, and imprisonment. Other medical conditions include cholera, dysentery, skin diseases, swelling of the uterus, and constipation.
Rahu Signs: Rahu has friendly signs namely Libra, Sagittarius, and Pisces while enemy signs include Cancer and Leo. There are friendly planets such as Mercury, Venus, and Saturn. However, Rahu is an enemy of Sun, Moon, and Mars. Rahu gives auspicious results in Taurus and Libra. Actually, Rahu is quite capable of bestowing, providing power and wealth when rightly glorified. Rahu gives fame, success in politics, money, and physical beauty [i.e., attraction].
Rahu Behaves like Saturn: Rahu and Saturn have the similar effect. It has smoky blue in colour and has impulsive and animalistic in nature. Rahu is interested in pulling off all that gives pleasure. Also, even after getting all Rahu wants it is never satisfied [this is truly an animal instinct]. Rahu rules no sign of the zodiac. However, it is linked to Virgo that is linked to Mercury. Since Rahu is connected to Saturn and Mercury as friends, Rahu has authority over Virgo.
Rahu God of Chemical Industry: Rahu rules all sorts of poisonous chemicals. These include fertilizers, pesticides and disinfectants that are used in modern era. Rahu also controls all substances with strong pungent smell like sulphur-dioxide gas. Hence, Rahu always presides over whenever a poisonous substance is involved. Generally Rahu leads whenever there are promoting name and fame like sudden luck gambling. This is the reason why Western astrologers regard Rahu as the greatest benefit force.
The gemstone associated with Rahu is a honey coloured hessonite [Gomed]. Its element is air and direction is south-west. Rahu reaches full maturity at age 42. According to Puranas, Rahu is half-bodied born of lioness and snakelike huge body. He is extremely powerful. According to Skanda Purana, Rahu supports ones power and changes enemies into friends. Effect of snakebite can be removed by Rahu’s grace. During lunar and solar eclipses, both Rahu and Ketu are qualified. In each Graha, Rahu and Ketu stay for 1 1/2 years.
Rahu and Ketu Story: According to Puranas, God Vishnu was distributing Amrita, nectar of immortality, meant for Devas only. During that time, Rahu a demon, mingled with Devas. Also, Rahu took a share of Amrita for himself. Both the Sun and the Moon noticed Rahu having Amrita so they showed the achiever. The alarm angered Lord Vishnu who flung his discus [Soodarshana Chakra] at Rahu. Lord Vishnu’s discus separated Rahu’s head from the rest of the body.
Interestingly, Amrita kept Rahu’s head immortal but not the remaining parts of his body.
Rahu is the Strongest Enemy of Sun and Moon: There is much wisdom and mysteries surround the Moon's Nodes in Vedic myth. They are considered of chief importance in chart understanding. As a matter of fact, while assessing planetary power the most powerful Graha is Rahu than the Sun. The North Node of the Moon or Rahu is powerful because it is capable of swallowing the Sun during total solar eclipse.
General Characteristics Of Rahu:
Color: Cola, blue, black
God / Deity: Lord Hanuman