Divination is all about fortelling the future. There are many methods in use today and these range from Astrology to the reading of tea leaves and encompass some of the better known forms of such as
Tarot,
Runes and
Dowsing.
Astrology is as much of a science as it is an art using as it does the position of the stars and other heavenly bodies. The science part is predicting where the various bodies were at the time of birth - this is a very mathematical process although there is software around now to make it easy. The Artistic part lies in the interpretation of the information gleaned from the astronomical data.
The Tarot and Runes are much easier to use and indeed anyone can learn very quickly. Some people have a natural gift for interpretation and readings can be very fascinating (sometimes very scary in their accuracy).