In Indian Astrology, Rahu is depicted in art as a dragon with no body riding a chariot drawn by eight black horses. Rahu is one of the navagrahas in Vedic astrology. The rahu kala is considered inauspicious.
According to legend, during the Samudra manthan, the asura Rahu drank some of the divine nectar. But before the nectar could pass his throat, Mohini the female avatar of Vishnu cut off his head.
Rahu is capable of giving power when rightly positioned or exalted, and it gives fame, success in politics, money, and attraction. Diseases caused by Rahu are paralysis, insanity, limb injury, cancer, tumors, heart pain, rheumatism, bronchitis, etc. and Problems caused are anger, leaving home, dissatisfaction, fear complex, liar, disfavor of superiors, etc.
Properly Mantra Healed Rahu Yantra written on Bhoj Patra / Copper Plate, grants victory over enemies, favour from the King or Government, and Reduction in Problems caused by Rahu. Rahu Yantra must be kept and worshipped in temple of your house. By the use of Rahu Yantra malefic effects of Rahu are eliminated.