This Hubble image of the Antennae galaxies the sharpest yet of this merging pair of galaxies. As the two galaxies smash together, billions of stars are born, mostly in groups and clusters of stars. The brightest and most compact of these are called super star clusters. (NASA, ESA/Hubble, and B. Whitmore – Space Telescope Science Institute/Handout/Reuters)
Reference : http://news.yahoo.com/photo/061018/photos_sc/
Orange Slate 