Gary Imm

GaryI

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A backyard amateur astrophotographer enjoying retirement with my wife on beautiful Lake Livingston in Onalaska, Texas, about 90 minutes north of Houston.

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A globular star cluster is a large grouping of stars that are gravitationally drawn together into a more concentrated spherical shape than open star clusters. About 150 globular star clusters have been identified to date. A cluster can contain upwards of a million stars. It forms a regular sphere with the density of stars increasing towards the center. Some clusters are predominately comprised of bluish stars which indicate that they are younger than those which have a larger proportion of reddish stars.