The extragalactic background light (EBL) is the second most energetic diffuse background that fills our Universe. It is produced by star formation processes and...

Galaxies and the dark matter halos in which they reside are intrinsically connected. That relationship holds information about key processes in galaxy and...

Twenty years ago, no one convincingly knew the age or the size of theUniverse to within a factor of two. Ten years ago, everyone agreed onthose same two numbers...

Apart from unique characteristics of galaxies at birth, a lifetime of different environments ("isolation", group, cluster) can also shapetheir main features. In...

The Sloan Digital Sky Survey is currently the largest spectroscopic survey of extragalactic objects and one of the most ambitious observational programs ever...

In this work we have tried to verify what types of bulges are the descendants and the precursors of the bulges with blue colors observed at intermediate z...

The European Space Agency's Planck satellite was launched on 14 May 2009, and has been surveying the sky stably and continuously since 13 August 2009. Its...

We introduce the strong CP problem and the existence of the Axion as a possible solution. We discuss the possibility that axions are the dark matter of the...