The evolution of planetarium shows: A case study in oral science presentations for the public

Science presentations for the public in the form of planetarium shows were investigated to track their evolution in terms of length and language, visuals and visual change, the application of learning theory, and tone. Scripts were entered into a word processor and subjected to a readability analysis. Counts of visual change in the shows were tracked and analysed. Concepts presented in the shows were analysed in terms of learning theory. From this information and other aspects of the scripts, the tone of the shows was described. Results indicate that shows have evolved to become more scientifically based, using more complex language and realistic visuals. Visuals are shown to carry more of the burden of communication in modern shows. Modern shows are also more participatory and inclusive, using some, but not all aspects of modern learning theory. This evolution is shown to better appeal to the profile of a typical visitor to a modern science venue.