With this selection of documentaries from the universe, explore and discover the secrets and wonders of the planets of the galaxy.
The universe is the totality of space and time, of all forms of matter, energy, impulse, laws and physical constants that govern them. However, the term is also used in slightly different contextual senses and refers to concepts such as cosmos, world or nature. Its study, in the greater scales, is the object of the cosmology, discipline based on the astronomy and the physics, in which all the aspects of this universe with their phenomena are described.
Science models the universe as a closed system that contains energy and matter ascribed to spacetime and that is governed fundamentally by causal principles. Based on observations of the observable universe, physicists try to describe the space-time continuum in which we find ourselves, along with all the matter and energy existing in it.
The universe has at least three dimensions of space and one of time, although experimentally additional dimensions can not be ruled out. Spacetime seems to be connected in a simple way, and space has a very small or even null curvature, so that Euclidean geometry is, as a general rule, exact throughout the universe.
The currently most accepted theory about the formation of the universe, that the universe was not stationary, that the universe had an origin. It is the Big Bang model, which describes the expansion of space-time from a spatio-temporal singularity. The universe experienced a rapid period of cosmic inflation that swept away all initial irregularities. From then on the universe expanded and became stable, colder and less dense. Minor variations in the distribution of the mass resulted in fractal segregation into portions, which are found in the current universe as galaxy clusters.