View of a Sun-like star within an open cluster (artist’s impression)
This video shows an artist's animation of an open star cluster. Most stars, including the Sun, are thought to have formed within open star clusters — groups of thousands of stars loosely bound together by gravity, destined to be spread throughout their host galaxy once the cluster matures and most of its gas disperses.
More information and download options: http://www.spacetelescope.org/videos/heic1321d/
NASA, ESA, and M. Kornmesser