Scientists Just Found a Galaxy Made Almost Entirely of Dark Matter!

Astronomers using the Hubble Space Telescope, the Euclid space telescope, and the Subaru Telescope have identified CDG-2 — a dark matter galaxy so faint it's nearly invisible, hidden in the Perseus Cluster 300 million light-years from Earth. This dark matter galaxy may be up to 99.99% dark matter, making it one of the most extreme dark matter dominated galaxies ever discovered. In this video, we break down how astronomers found a dark galaxy using globular clusters, what dark matter actually is, why the universe should be full of dark matter galaxies according to the Lambda-CDM model, and what this discovery means for our understanding of dark matter and dark energy. 🔭 What you'll learn about dark matter and this dark galaxy discovery: What is dark matter and why does it matter for galaxy formation How Hubble, Euclid, and Subaru confirmed a real dark matter galaxy Why CDG-2 might be the most dark matter dominated galaxy ever found The science behind dark galaxies, globular clusters, and cosmology What Euclid's dark matter survey could reveal next If you're into space, astronomy, dark matter, black holes, the universe, cosmology, and the biggest mysteries in physics, subscribe for more deep dives into dark matter, dark energy, and the hidden universe. ⏱ Timestamps 0:00 Intro – A galaxy you can't see 0:45 What is dark matter? 2:00 The theory: why dark matter galaxies should exist 4:00 How astronomers search for a dark galaxy 6:00 CDG-2: the dark matter galaxy discovery 8:30 Just how dark is CDG-2? 10:00 What this means for dark matter and dark energy research #DarkMatter #Space #Astronomy #Universe #DarkGalaxy #Euclid #Hubble #Cosmology #Science #DarkEnergy