From the first astrolabe in the links (medieval astrolabe), I learned that the astrolabe is an astronomical calculating device. It was used a lot in the Middle Ages, especially before we had the invention of clocks that we know of today. In terms of collaboration, I notice that there are different kinds of art located on the astrolabe, so there must have been some sort of collaboration that allowed the different pieces to come together. This kind of artifact tells us that scientific knowledge even in the Middle Ages was already quite advanced. I can make the astrolabe relevant to my students by connecting their knowledge of time and space with that of the ancients in the Middle Ages.