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The 21st century is a true golden century for astrophysics. Never have we experienced such a rapid pace of discoveries about the universe since 1995, marked by the discovery of the first exoplanet and the Hubble image telling the story of the universe. In just ten thousand and one nights, a real paradigm shift has transformed the story of our cosmic origins. We will see how the first unexpected discoveries of the James Webb Space Telescope confirm or upset our certainties… A conference given by David Elbaz at the Rencontres du ciel et de l'espace, in November 2022.