A globular cluster is a spherical collection of stars that orbits the core of a Galaxy as a satellite. I call them mini-galaxies. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes.

Globular clusters, which are found in the halo (i.e. away from the plane) of a galaxy, contain considerably more stars and are much older than the less dense galactic, or open clusters, which are found in the disk. Globular clusters are fairly common; there are about 150 to 158 currently known globular clusters in the Milky Way, with perhaps 10 to 20 more still undiscovered. Large galaxies can have more: Andromeda, for instance, may have as many as 500. These globular clusters orbit the galaxy out to large radii, 40 kiloparsecs (approximately 131,000 light-years) or more.

Here are couple of Globs (as we call them) that I have shot:

From Globular Clusters. Posted by Madhup Rathi on 6/05/2015 (4 items)

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