This is a Hubble Space Telescope image of a pair of star clusters that are believed to be in the early stages of merging. The clusters lie in the gigantic 30 Doradus Nebula, which is light-years from Earth. (via Merging clusters in 30 Doradus
Featured Image: the cosmic ice sculptures of the Carina Nebula via Hubblesite. The visible space is big, complex and can be incredibly beautiful. This list of 9 pictures gathers the most beautiful images of our universe I could find.