Roy Easto gave us a talk about The Dynamic Universe this evening, using animated computer models to show how dynamic systems in our universe develop over time. The use of computer models is helping us to understand some of the things we see in astronomical images at all scales from solar systems to clusters of galaxies and inter-galactic voids. As computers become more advanced the complexity of the models can be increased, and results more enlightening, but even relatively simple models can shed light on astronomical phenomena. Among the models Roy demonstrated were ones demonstrating the evolution of galaxies, stellar collisions, asteroid distributions and the development of the early universe.