Hydrogen maps of the Magellanic Clouds (the two white spots to the left) show streams of material trailing behind the galaxies. Called the Magellanic Stream, this material was stripped off the two small galaxies by our Milky Way.
M. Putman (U. Colorado)/L. Staveley-Smith (CSIRO)/K. Freeman (ANU)/B. Gibson, D. Barnes (Swinburne)