Invisible Dark-Matter Dwarf Galaxy Ripped Through Ours | Supercomputer Simulation

Follow the ripples! That's what scientists have done to pinpoint the location of a dwarf galaxy, composed mainly of dark matter, that disrupted our Milky Way galaxy. A billion-year time-lapse reveals the path it traveled.

credit : Sukanya Chakrabarti video, edited by Roxanne Makasdjian and Stephen McNally.