Our representation of the Universe has evolved throughout the ages. From the first men to Ptolemy, we have always tried to understand the skies. Modern astronomers have access to tools that their ancestors did not even dream of. This lead to multiple big and small revolutions in our understanding of the Universe in the last centuries. We retrace some of these moments that shaped our knowledge of the Universe.
Bio: Sebastien Lavoie is a second year PhD student at the University of Victoria. Prior to that he obtained his MSc in Quebec City. He studies the evolution of massive galaxies in clusters.