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The comoving distance from Earth to the edge of the observable universe is about 14.26 gigaparsecs (46.5 billion light-years or 4.40 × 10 26 m) in any direction. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs [27] (93 billion light-years or 8.8 × 10 26 m). [28]
The spatial region from which we can receive light is called the observable universe. The proper distance (measured at a fixed time) between Earth and the edge of the observable universe is 46 billion light-years [50] [51] (14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs). [50]
Visualization of the whole observable universe.The inner blue ring indicates the approximate size of the Hubble volume. In cosmology, a Hubble volume (named for the astronomer Edwin Hubble) or Hubble sphere, Hubble bubble, subluminal sphere, causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that ...
It represents the boundary between the observable and the unobservable 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 simply the age of the universe times the speed of light, as in the Hubble horizon, but rather the speed of light ...
The observable universe ... " π 39 (Pi and the size of the Universe)". Numberphile. Brady Haran. Archived from the original on 2015-04-30; What do you mean the ...
The paper states that "14 of the 31 GRBs are concentrated within 45 degrees of the sky", [3] which translates to the size of about 10 billion light-years (3 gigaparsecs) in its longest dimension, [original research?] which is approximately one ninth (10.7%) of the diameter of the observable universe. However, the clustering contains 19 to 22 ...
When the size of the universe at Big Bang is described, it refers to the size of the observable universe, and not the entire universe. [ 143 ] Another common misconception is that the Big Bang must be understood as the expansion of space and not in terms of the contents of space exploding apart.
Size (left) and distance (right) of a few well-known galaxies put to scale. There are an estimated 100 billion galaxies in all of the observable universe. [1] On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local Group (see list of nearest galaxies for a complete list).