Universe For other

Universe For other uses, see Universe (disambiguation). The visible light image deepest of the cosmos, the Hubble Ultra Deep Field. The Universe is generally defined as everything that physically exists: the entirety of space and time, all forms of matter, energy and momentum, laws and physical constants that govern them. However, the term "universe" can be used in slightly different contextual senses, to refer to concepts as the cosmos, the world or nature. Astronomical observations indicate that the universe has an age of 13.73 0.12 billion years and at least 93 billion of "light years" in length. The event that began the universe is called the Big Bang . In that instant all matter and energy in the observable universe was concentrated at a point of infinite density. After the Big Bang, the universe began to expand to reach its current status, and continues to do so.Because, according to the special theory of relativity, matter can not move faster than that of light, may seem paradoxical that two objects in the universe may have separate 93 billion light years away in a time of only 13 billion years, but this separation is a natural consequence of the theory of general relativity. Put simply, space can expand faster than that is not limited by the speed of light. Therefore, two galaxies can be separated from one another faster than the speed of light, is the space between them which it grows. Measurements on the spatial and redshift (redshift) of distant galaxies, the cosmic microwave background, and the relative percentages of lighter chemical elements, support the theory of expanding space, and more generally, the Big Bang theory, which proposes that space itself is created from scratch in a specific time in the past.Recent observations have shown that this expansion is accelerating, and that most of matter and energy in the universe is fundamentally different from that observed on Earth, and is not directly observable (cf. dark matter and dark energy). The imprecision of current observations has limited predictions about the fate of the universe. Experiments suggest that the universe has been governed by the same physical laws, constants throughout its extent and history. The dominant force in cosmic distances is gravity, and general relativity theory is currently the most accurate in describing it. The other three fundamental forces and particles in which they operate, are described by the Standard Model. The universe has at least three dimensions of space and time, although experimentally not excluded very small extra dimensions.The space-time appears to be connected easily and smoothly, and the space has a very small mean curvature, so that Euclidean geometry is, as generally accurate throughout the universe. In philosophy the world is called the universe or set of everything that happens. Science models the universe as a closed system that contains energy and matter attached to the space-time and that is primarily governed by causal principles. Based on observations of the observable universe, physicists attempt to describe the space-time that we, along with all matter and energy within it. Their study, in the largest scales, is the subject of cosmology, a discipline based on astronomy and physics, which describes all aspects of this universe with its phenomena. The currently most accepted theory about the formation of the universe, given by the Belgian Walloon Lema tre, is the Big Bang model, which describes the expansion of space-time from a singularity.The universe underwent a rapid period of cosmic inflation that wiped out all initial irregularities. Since then the universe expanded and became stable, cooler and less dense. Minor variations in the distribution of mass resulted in fractal segregation into portions, which are found in the universe today as clusters of galaxies. As to your final destination, the current evidence seems to support the theory of permanent expansion of the universe, although others maintain that the dark matter can exert enough gravitational force to halt the expansion and make it all matter is compressed, something to what scientists call the "Big Crunch or the Big Crunch.