ABSTRACTS AND KEYWORDS
How did it all begin? One simple question but many possible answers. The more we know about the universe, the more theories and models are proposed to explain its origins. At present, the cosmological debate is experiencing a multitude of new approaches that have to remain compatible with the astrophysical observations accumulated to date. The following pages will review the characteristics of the known cosmos to try and unravel the other unknown cosmos:: Universe, Cosmos, Astrophysics, Cosmology, Big Bang.