At the beginning, it looks like Windows 3.1 Starfield screensaver. Then you realise what's going on: Those are not stars - they are galaxies. By the end, when the heart of the galaxy cluster is revealed, your brain explodes.
This trip into Abell 315 - a galaxy cluster located about two billion light-years away from Earth - was taken by the MPG/ESO 2.2-metre telescope at La Silla Observatory in Chile. It is mind blowing on its own right, but when I read that the survey area is just the size of a full Moon, all my brain functions shut down and I woke up 10 minutes later with my notebook's keyboard carved into my face. [Physorg]