Changes

A '''globular cluster''' is a spherical grouping of [[star|stars]] that share a common origin and orbits the galactic core of a [[galaxy]] as a satellite.  They are very tightly bound by [[gravity]] and contain anywhere from tens of thousands to million of stars in an area that is only some 300 light years across or less, and are generally oblate spheroids in shape.  The density of the clusters are on average around 0.4 stars per cubic [[parsec]], but increases toward to the center of the cluster, reaching as high as 100 or even a 1000 stars per cubic parsec.<ref>http://www.astro.keele.ac.uk/workx/globulars/globulars.html</ref>

A '''globular cluster''' is a spherical grouping of [[star|stars]] that share a common origin and orbits the galactic core of a [[galaxy]] as a satellite.  They are very tightly bound by [[gravity]] and contain anywhere from tens of thousands to million of stars in an area that is only some 300 light years across or less, and are generally oblate spheroids in shape.  The density of the clusters are on average around 0.4 stars per cubic [[parsec]], but increases toward to the center of the cluster, reaching as high as 100 or even a 1000 stars per cubic parsec.<ref>http://www.astro.keele.ac.uk/workx/globulars/globulars.html</ref>