La matière noire existe-t-elle vraiment ? Hervé Dole répond

Planetarium now has its official channel! With all the new episodes 👉    / @planetarium   Dark matter, like dark energy, is one of the greatest mysteries of modern cosmology. This episode of Planetarium explores the question in a documentary style with astrophysicist Hervé Dole. For several decades, astronomers and physicists have believed that a form of "invisible matter" makes up a significant part of the Universe. Estimates suggest that dark matter represents more than a quarter of the total content of the Universe and nearly 85% of all known matter. Ordinary matter, on the other hand, is thought to represent only 5% of our universe... Yet, despite very convincing indirect observations, no one has yet directly detected dark matter, nor dark energy, and new observational tools like DESI are still casting doubt on our existence. So, do dark matter and dark energy really exist? In this program, French astrophysicist Hervé Dole explores the scientific evidence that led researchers to propose the existence of dark matter, the experiments currently underway to try to observe it, and alternative hypotheses that could challenge our understanding of the Universe, such as WIMPs (Whole-Ion-Plain Phenomena). On the agenda: Why did scientists imagine dark matter? What proportion of the Universe does it actually represent? Is dark matter a danger to the universe? How are researchers trying to detect dark matter? What does this quest teach us about the origin and evolution of the universe? Hervé Dole is the author of the book "The Dark Side of the Universe," reissued in 2026 by Dunod. A professor at Paris-Saclay University, he has worked on several major historical space missions, such as the Euclid space telescope and the Planck satellite. Subscribe to the Planetarium show playlist, presented by Sylvain Chatelain and Tristan Vey every week:    • Planétarium   #planetarium #darkmatter #darkenergy #science