Vibrant Star Cluster Sparkles in Sagittarius Constellation (Video)

The Messier 18 star cluster — which can be seen in the upper left of the new telescope view — is located about 4,600 light-years from Earth, in the constellation of Sagittarius (the Archer). Messier 18 is an example of an open star cluster because its stars are younger and more loosely packed together than those of globular star clusters.