As yet, astronomy, the most ancient of all sciences, surprisingly is not included in French secondary science classes. Recent trends in favour of a more attractive and motivating scientific education have taken it up.

Astronomy has, at all times, been arising curiosity, and now provides a privileged field to scientific approach :

1. • Observation of the vault of heaven and its peculiarities

2. • Description of its general appearance and of the specific movement of stars and planets

3. • Measurement of distances, coordinates and angles.

4. • This will make it possible to define successive models, which will be ever closer to the observed reality.