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On this page about Observable universe:

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Encyclopedia: Observable universe

The observable universe (also called the Hubble Volume) is a term used in Big Bang cosmology to describe the region of space bounded by a sphere, centred on the observer, that is small enough that we might observe objects in it, i.e. there has been sufficient time for light emitted by an object to arrive at the observer. Every position has its own observable universe which may or may not overlap with the one centered around the Earth.

Translations

How to say "Observable universe" in other languages:

	(German)	Beobachtbares Universum
	(French)	Univers observable

Search results

Googolgon

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Stuff

13.7 billion years ago. There are approximately 3x10 55 grams of stuff in the observable universe...

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Cosmos

The cosmos is the universe, especially when thought of as an orderly or harmonious system. Sometimes the term 'cosmos' is considered to be only the observed universe, while the term "universe" refers to all that exists whether it has been discovered or not. 'Cosmos' is the "known universe." It may...

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Powers of Ten

10 26 meters, or the size of the observable universe. The camera then zooms back in to the picnic... contains a sequence of pictures starting with the universe and moving in powers of ten down to subatomic...

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Cosmic inflation

consequence of this expansion, all of the observable universe is posited to have originated in a small... in the 1970s. Among these are the observed flatness of the universe (the flatness problem), its... were predicted by Grand Unified Theories or to use observations of the universe to constrain those...

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Scientific notation

distance to the edge of the observable universe is ~4.6 × 10 26 m and the mass of a proton is ~1.67 x 10...

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Sloan Digital Sky Survey

a full list of these publications covering distant quasars at the limits of the observable universe... 25% of the sky and obtain observations on around 100 million objects. It has redshifts for galaxies.... Observations SDSS uses a dedicated 2.5m optical telescope, and takes images through five filters (named u, g...

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Topological defect

topological defects that formed during the universe's formation could theoretically be observed. No... the observable universe they would result in significant deviations from what astronomers can see... theories to form at phase transitions in the very early universe. As the universe expanded and cooled...

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Cosmic variance

Cosmic variance is a notion related to the fact that we only observe one copy of the Universe. The... observe inside of the particle horizon of the Universe, i.e. inside the sphere which is often called the observable Universe or the observable sphere, are considered to be the results of some random...

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Light year

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