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

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

ago and that the universe subsequently expanded. Today, the universe has expanded into an age and size that is only partially observable from Earth; while...

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

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...

cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale...

by Alan Guth. It defines a realm like the one that contains the observable universe as only one of many inflationary zones. Astrophysicist Jean-Luc Lehners...

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

Known Universe or known universe may refer to The entire universe The observable universe, the part of the universe that can be observed from Earth Known...

In physics, an observable is a physical property or physical quantity that can be measured. In classical mechanics, an observable is a real-valued "function"...

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...

space than is available in the known universe. Sagan gave an example that if the entire volume of the observable universe is filled with fine dust particles...

astrophysics, the Eddington number, NEdd, is the number of protons in the observable universe. Eddington originally calculated it as about 1.57×1079; current estimates...

causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer...

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...

retrieve information. This observable constraint is due to various properties of general relativity, the expanding universe, and the physics of Big Bang...

generation of matter in a young universe. The zero energy solution for Minkowski space representing an observable universe, was provided in 2009. In his...

number of Planck volumes in the observable universe. Thus Graham's number cannot be expressed even by physical universe-scale power towers of the form...

enhanced. Chary himself is skeptical: Many other regions beyond our observable universe would exist with each such region governed by a different set of...

context, the size of the observable universe is currently about 46 billion light years in all directions from earth. The universe is thought to be that size...

scales, that the universe is eternal rather than bounded in time by the Big Bang, and that the expansion of the observable universe is caused by annihilation...

the perfect cosmological principle, a principle that says that the observable universe is always the same at any time and any place. From the 1940s to the...

there are between 200 billion (2×1011) to 2 trillion galaxies in the observable universe. Most galaxies are 1,000 to 100,000 parsecs in diameter (approximately...

assumptions that would be needed for estimates and suggests that the observable universe has more entropy than previously thought. This is because the analysis...

expanding too rapidly. The observable universe is one causal patch of a much larger unobservable universe; other parts of the Universe cannot communicate with...

matter experienced in everyday life) and antibaryonic matter in the observable universe. Neither the standard model of particle physics nor the theory of...

light-years away and stretches across roughly a 15th of the radius of the observable universe. It was discovered using data from the Sloan Digital Sky Survey by...

known structure in the observable universe, measuring approximately 10 billion light-years in length (the observable universe is about 93 billion light-years...

regions of the universe, so its distance at the present epoch defines the size of the observable universe. Due to the expansion of the universe, it is not...