We briefly review some of the basic properties of the Chandra Deep Field (CDF) X-ray sources, explore the CDF X-ray number counts for both AGN and galaxies and how they contribute to the X-ray background, and highlight a few recent results regarding the host-galaxy morphologies of the CDF AGN using HST ACS data. We also discuss how these AGN relate to the evolution and feeding of super-massive black holes in the Universe.
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