Globular clusters are some of the oldest objects known in the universe. They are also some of the prettiest.
These objects are spherical collections of stars bound together gravitationally. Although their origins are not completely understood, some theories suggest they are formed during galactic collisions and might be closely related to smaller spherical galaxies.
Globular Clusters are some of the more interesting objects to observe in an amateur telescope. They appear as large spherical blobs - with thousands of the individual stars sometimes resolveable. Some clusters, such as the famous Great Globular Cluster in Hercules are visible to the naked eye in dark skies. Most others you'll have to look for.