The latest Hubble image showcases ESO 306-17, a large elliptical galaxy that belongs to one such "fossil group" (the term astronomers use to refer to loner galaxies). The name arises because scientists aren't sure if these galaxies really are fossils and represent the remnants of a once vibrant galactic community, or whether they offer compelling evidence that ESO 306-17 is a ravenous cannibal that devoured its closest neighbours -- an extreme version of what may have happened in the Milky Way. Read more