Construction of didactic devices that materialize the states of illumination of the ground and of the planet

The original design of the IAUS367 included the development of a Workshop, thought to be a face-to-face instance, in order to interact with teachers and researchers, and to discuss the design, the theoretical foundations and the use of some didactic devices to observe and record the state of illumination and shadows casting variations on different objects, natural or artificial, through time, and its interpretation from a local, topocentric perspective, together with a global, planetary perspective. The pandemic forced us to convert this activity in a virtual one, which was very interesting anyway, with the participation of colleagues from different countries and with great theoretical wealth in the discussions. The Workshop lasted 2 hours, in Spanish language. We present here the initial proposal and a summary of what was discussed. (The complete video register can be accessed in the YouTube channel of IAUS367).