Credit: Fred Herrmann, 2014, http://cs.astronomy.com/asy/m/galaxies/489483.aspx
Pair of nearby galaxies with possible intergalactic transfer: This image shows M81 (bottom right) and M82 (upper left), a pair of nearby galaxies where “intergalactic transfer” may be happening. Gas ejected by supernova explosions in M82 can travel through space and eventually contribute to the growth of M81.