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

Professor David Block in conversation with Dr Andy Brough.
In Episode 4, we discuss the Andromeda Galaxy, the NASA simulation on colliding galaxies, a NASA-JPL press release as well as Prof Block's publication in Nature - one of the world's most prestigious scientific journals. (D.L.Block, F. Bournaud, F. Coombes, R. Groess, P. Barmby, M.L.N. Ashby, G.G. Fazio, M.A. Pahre, & S.P. Wilner (2006), An almost head-on collision as the origin of two off-centre rings in the Andromeda galaxy. Nature, 443 (19), October.