This article relates the methodology that was worked with a group of study of astronomy, in the school, called Astronomical Fraternity, as a teaching strategy of the natural sciences. In the first place, the characterization of the school where this strategy was implemented is carried out, then, the activities that were carried out with the study group are described, recognizing the benefits that this offers from the link of the teaching of biology, chemistry, and physics, for the construction of models aiming at the elaboration of explanations; collaborative-cooperative learning for the learning of the natural sciences and astronomy; provide scenarios and alternative spaces to the classroom. Finally, the conclusions obtained from this type of pedagogical implementations are shown.