"Beyond"- Episode 4 trailer (The Dance of the Galaxies)

Join Prof David Block and Dr Andy Brough as we discuss "The Dance of the Galaxies."
The Advanced Visualization Laboratory (AVL) at the National Center for Supercomputing Applications (NCSA) collaborated with NASA and Drs. Brant Robertson and Lars Hernquist as they visualise two colliding galaxies that interact and merge into a single elliptical galaxy over two billion years.