Prologue: Transfigured night
1. Gravity's rainbow: Galileo, Newton, Einstein
2. General relativity: From the theory of gravity to the theory of the universe
3. Observing the universe
4. Inner space, outer space: so close and so far away
5. The first moments: from inflation to the first light
6. Dark energy and quantum vacuum
7. Leçon de ténèbres: black holes
8. Gravity turned into waves
10. A new constellation in the sky: LISA
11. Epilogue: Towards what future?