Prasanam

Determining the rising star at the time of birth and preparing the horoscope of the native and on this basis predicting the good and the bad effects that may ensue in the course of his life is called the art of horoscopy

But the Science of Inquiry (or 'PRASNA') is a more intriguing one.

A man loses his property all of a sudden; how does it happen? Can he ever recover it? A person hides an object in his hand and inquires the astrologist whether he can declare what it is. Or he thinks of some object or idea; can the astrologist predict its nature, quantity and characteristics?

That science which solves these enigmas is named Prasna. The means by which one is able to determine exactly the various configurations of the planets at one particular moment, whether in the present, past or future is called the science of calculation