The objective of this study is to verify how much high school students know about astronomy and the alternative conceptions that they hold, and to explore if in some way the personal and academic development throughout the different school years improves this knowledge. For that reason, an open-answer questionnaire has been prepared and carried out to 194 students, in which the knowledge related to the Earth-Sun-Moon system is studied. The results confirm that the most common erroneous alternative conceptions are present in the sample and show their persistence in the students throughout the courses, so an improvement in the teaching and learning process of astronomy in the curriculum would be necessary to face the understanding difficulties that they are presented with.... [Leer más...]