Wie kann das sein?! Urknall und Dunkle Materie • Das große Rätsel des Universums | Harald Lesch

Why does our universe need dark matter for galaxies, stars, and ultimately planets to form? Observations of the cosmic microwave background radiation, spiral galaxies, and gravitational lensing show that visible matter alone is insufficient. Harald Lesch explains the connections: Dark matter may have already created the gravitational structures in the early universe in which normal matter later accumulated. This directly links the story of the Big Bang to one of the greatest unsolved mysteries of modern cosmology. As a companion and supplement to the video series, you can find the books "Can We Understand the World?" and "Cosmology - The Greatest Story of All Time," with over a thousand pages and hundreds of illustrations, at www.urknall-weltall-leben.de. The videos are linked via QR codes. We hope you enjoy this scientific journey from Aristotle to string theory! #Astronomy #Cosmology #Science #Physics Chapter markers: 00:00 The beginning of the universe and its expansion 01:50 The monistic worldview: mind and matter 03:00 Philosophy of science and everyday technology 05:10 The mystery of dark matter 07:00 The cosmic microwave background radiation 09:00 Radiation pressure vs. gravity in the early universe 11:10 Dark matter as the seed of structures 12:15 Rotation curves and galaxy clusters 14:50 The cosmological principle and Occam's razor 16:45 Gravitational lensing and its detection 18:25 Book recommendation: Cosmology Big Bang, Universe and Life (www.urknall-weltall-leben.de) Scientists explain science Books related to the channel ► https://urknall-weltall-leben.de/shop... Live lectures ► https://www.josef-gassner.de/veransta... Donate ► https://urknall-weltall-leben.de/spen... Subscribe ► https://www.youtube.com/user/UrknallW... Thank you to everyone who supports our project!