Artistic representation of the potentially habitable world Kapteyn b with the globular cluster Omega Centauri in the background. It is believed that the Omega Centauri is the remaining core of a dwarf galaxy that merged with our own galaxy billions of years ago bringing Kapteyn's star along. Image released June 3, 2014. Credit: PHL @ UPR Arecibo, Aladin Sky Atlas View full size image Astronom