Abstract
Aiming at the exploration of different didactic resources in the teaching-learning process, and to overcome the traditional methodology of classes, it is proposed the construction and use of a demonstration experiment, also called a desktop experiment, which consists of a didactic model of the Sun-Earth-Moon system, associated with the use of a computer to aid the visualization of phases of the Moon and solar and lunar eclipses. A brief exposition of the main phases of the moon and eclipses is developed. The result obtained after the construction of the model is quite satisfactory and the combination of its use with the computer can potentially help the students understanding of the phenomena approached by giving them the possibility of observation and reflection from two viewpoints: as observers on Earth and as external observers.
