Astronomy Picture of the Day . ... Dramatically, the size of the fluctuations in the BOOMERANG image has convinced many cosmologists that the universe contains just exactly enough matter and energy to be flat -- a powerful prediction of the popular theory of Inflation which describes the earliest moments of the Big Bang . ... Publications with keywords: cosmology - universe - inflation - early universe - big bang - cosmic microwave background radiation . ... Building Galaxies in the Early Universe . ...