Episode notes
A 147 Million Year Old Galactic Brawl
Keywords
earthWikipediaCrime SceneClusterKilometers PerDark MatterMilky WayLight YearsNgc 1268PerseusEuclid Space Telescope147 MillionType IaMillion LightCatalogChandrasekharPlus MinusWhite DwarfCentral BarSpiral Arms