Big Ball of Stars

In this picture of Omega Centaury I tried to resolve as many stars as possible, and reveal their distinctive colors. This huge globular star cluster has several million stars and is best observed in the Southern Hemisphere. Among the stars it has, are the well known -for variable star observers as myself- RR Lyrae stars. These stars, although dim, they can be used as standard candles for objects that are beyond the possibilities of the parallax technique.