A Chandra Yantra is an occult device used to appease the planet Moon. Planet Moon is the responsible for mental and emotional balance. Disturbance in mental or emotional life is a result of a weak Placement of Moon in the Birth Chart. A Chandra Yantra can be used by those who suffering with ill Placement of Moon in their birth-charts to neutralize the malefic effects caused by this ill - Placement and to obtain the blessings of Moon.