Abstract:
If one force could be held accountable for the universe, then it should be gravity. 
Interacting galaxies pull gas into spiral arms, leading to collisions between cold clouds
 that trigger the collapse of stars and the formation of their planet-forming discs.
Computer modelling is a great tool for exploring these events, picking through their
evolution from different viewing angles and varying conditions. In this talk, Ifll walk from
 the large-scale galactic interactions to the small scale of planet atmospheres to give an
 overview of the projects I have been examining.