Roquetes (Tarragona), 10th of November of 2015 - Following the tradition, the next Sunday 22nd of Novembre the Ebro Observatory (Ramon Llull University - High Council of Scientific Research) will organize an Open Day, within the framework of the 20th Science Week and the project "Anys de Llum a la Ciutat". The event will consist on a conference, by science historian Antoni Roca, a guided visit to the Observatory and a visit to the expo "La mirada microscòpica".