The evolution of our Universe has been shaped by different eras since its early fast expansion, the Big-Bang. It has been a long way from a world with only light and elementary particles, to a world of galaxies, stars, atoms and molecules. In this presentation, we will travel through space and time and see how the stars have transformed the Universe, filling their surrounding with light, and allowing a wide variety of chemical elements to propagate in space. Billions of years of star-formation eventually led to the formation planetary system, just like ours, enabling life to emerge.