Exercises in Archaeoastronomy - I - Introduction

Here it is given the first article of a series proposing exercises in archaeoastronomy. After a short introduction to the series, it is given a sample of exercise. It concerns the study of the orientation of the Stonehenge monument. As shown by this example, the exercises will be well-defined cases, supplemented by solutions, and proposed in the framework of an experimental approach that everybody can repeat.