the-star-stuff: Globular Cluster It is a large group of…
Globular Cluster
It is a large group of old stars that are closely packed in a symmetrical, somewhat spherical form. Globular clusters, so called because of their roughly spherical appearance, are the largest and most massive star clusters.
The globular clusters in the Milky Way are all estimated to be at least 10 billion years old and therefore contain some of the oldest stars in the galaxy.
Credit: x ; Photographs by Rolf Wahl Olsen
Reposted from http://ift.tt/KJSR3q.
