The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes...

evidence (WMAP, BOOMERanG, and Planck for example) imply that the observable universe is flat to within a 0.4% margin of error of the curvature density...

and the universe has been expanding ever since. Today the universe has expanded into an age and size that is physically only in parts observable as the...

The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic...

suggested the universe emerged from a "primeval atom". Various cosmological models of the Big Bang explain the evolution of the observable universe from the...

black hole cosmological model) is a cosmological model in which the observable universe is the interior of a black hole. Such models were originally proposed...

the Universe, there is no particular reference point with which to plot the overall location of the Earth in the universe. Because the observable universe...

that the observable universe becomes limited to local galaxies. There are various scenarios for the far future and ultimate fate of the universe. More exact...

Observable universe – All of space observable from the Earth at the present Observational cosmology – Study of the origin of the universe (structure and...

the universe, but even galaxies and star systems consist almost entirely of empty space. Most of the remaining mass-energy in the observable universe is...