The galaxies do not move around the Universe in a disorderly fashion, but form a veritable network of soap bubbles known as the cosmic web. This web is made up of large voids surrounded by filaments along which the galaxies move before ending their journey at the nodes where gigantic clusters of galaxies form. In this lecture, we will explore the Universe over billions of light years in order to understand how this cosmic web is woven, what its origins are, how it influences the birth and evolution of galaxies and how it represents a formidable cosmological probe enabling us to understand the history and composition of the Universe.

Lecture in French