The object shown is a Globular cluster.A globular cluster is a cluster/collection of stars that orbit a galactic core. They are stars that are very tightly bound close together by gravity. This is what gives the the spherical shape, like shown in the picture. This is the M13/NGC 6205. It is known as the Hercules Globular Cluster. It's called this because it is a gobular cluster located int he constellation of Hercules. It was discovered in 1714 by Edmond Halley and then catalogued by June 1, 1764 by Charles Messier.
As we can see, this particle image of M13 contains many orange stars, as well as blue stars. The most massive stars were originally blue,but since ran out of hydrogen and became red giants (the red stars you see). The medium mass stars are what we still see as blue, hydrogen burning stars.
Arnette, Bill. "Helix Nebula." Nine Planets. <http://astro.nineplanets.org/twn/n7293x.html>.
Frommert, Hartmut and Kronberg, Christine. "NGC 7293." Students for the Exploration and Development of Space. <http://www.seds.org/MESSIER/xtra/ngc/n7293.html>
|Right Ascension (J2000)||16h 41.7m|
|Declination (J2000)||+36° 27′ 35.5″|
|Filters used||B (Blue), R (Red), V (Green)|
|Exposure time per filter||B (10.0/sec), V (20.0/sec), and R (20.0/sec);|
|Date observed||November 01, 2012|