Astronomers Spot ‘Ghost’ Galaxy Orbiting Milky Way
Using data from the European Space Agency’s Gaia satellite, a team of international researchers has discovered a dimly lit dwarf galaxy orbiting our own at a distance of about 130,000 light-years. Antlia 2 features an unusually low density for its size, and had been obscured by the Milky Way’s bright disk. Astronomers now wonder whether this “oddball” is one of “a large population of nearly invisible dwarfs” waiting to be discovered. The researchers continue to explore Gaia’s data, hoping to learn more about how dwarf galaxies form.