Perception is first of all the recognition of an object or state in our immediate environment with the help of our 5 senses. With the help of technical devices, we can exceed the limits that are set biologically for us and expand them many times. The perception of such, invisible subjects and states therefore often first takes place in an abstract way with values ​​that are assigned to certain parameters and can be visualized based on this. The clear way of representing values ​​is in a graphic, drawing or a scaled model. Since size relationships play a decisive role here, in some cases you are forced to not display the relationships of objects proportionally to one another in order to be able to ensure that they are clearly recognizable. The series “Cognition” deals with this topic by using terms from the fields of physics and astronomy and presenting them in simplified models.