GC1052-DF2 is a large, but very diffuse galaxy located some 65 million light-years away. The galaxy is thought to contain a negligible amount of dark matter. This image was captured by the Advanced Camera for Surveys on the Hubble Space Telescope. (Credit: NASA/ESA/P. van Dokkum (Yale University))

Some 60 million light-years from Earth, not too far from our local galactic neighborhood, a strange little galaxy is causing a cosmic stir. This little island universe holds far fewer stars than yo