Arturo Chiesa is a Doctor in Physics, graduated at Milano University and his son Raffaele is an Electronic Engineer from Milano Polytechnic University.
For more than thirty years Arturo and Raffaele have been working in the fields of celestial navigation and elementary astronomy. They give seminars and lectures on celestial navigation and elementary astronomy in Italy and Switzerland and they lead stages on sailing yachts along the main routes of the Mediterranean Sea and beyond.
Arturo and Raffaele's aim has always been the creation of calculation and graphical software with a view to greatly simplifying the work of yachtsmen and astronomy hobbyists. Some good friends of them, ocean navigators, currently use their programs and they have always appreciated their suggestions and feedback.
Positional Astronomy is the science describing the position of an object in the sky and its movement in the celestial sphere.
The argument is treated in a plain but exhaustive way, allowing also the beginners to easily approach this subject.
The book includes many examples (more than 70 colour images) which can also be reproduced thanks to a software developed by the Authors (free download)