Splitting a block with feather and wedges:Splitting a block with feather and wedges Tidal force bar formation gif: https://pages.uoregon.edu/imamura/122/lecture-7/sites.html Solo bar instability gif: https://astro.pas.rochester.edu/~aquillen/galaxydyn.html Link to Patreon — one exclusive video per month:https://www.patreon.com/acollierastro I have merch: https://store.dftba.com/collections/angela-collier