Centaurus A (also known as NGC 5128 or Caldwell 77) is a galaxy in the constellation of Centaurus.
It was discovered in 1826 by Scottish astronomer James Dunlop , in New South Wales, Australia.
There is considerable debate in the literature regarding the galaxy's fundamental properties such as its Hubble type (lenticular galaxy or a giant elliptical galaxy) and distance (11–13 million light-years). NGC 5128 is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers.
The galaxy is also the fifth-brightest in the sky, making it an ideal amateur astronomy target. It is only visible from the southern hemisphere and low northern latitudes.

NGC 5128 is the nearest giant elliptical available for study at a 3.8 Mpc distance from us. Its close proximity provides the opportunity to perform a detailed study of its globular cluster system at a level of detail that is not possible in other giant ellipticals at present. At present there are over 600 globular clusters within this galaxy that have been confirmed. 

In this image many Globular Cluster are visible ...