Besides, when we come to the astronomical subject it is a very vast subject and it has a connection with every existing art and science, and vowels and words have their connection with the astronomical science. By invoking a certain word one invokes a certain planet; either in order to diminish its influence, if it is unfavorable, or to increase its power, if it is favorable. Therefore in the astronomical science of the Hindus whenever the name is given to a person, it is given according to the astronomical science.