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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 ...
[6] [7] [8] The current version of The Scale of the Universe 2 uses Pixi.js instead of Flash, ported by Matthew Martori. [6] The Scale of the Universe was featured on NASA's Astronomy Picture of the Day on October 7, 2018. [9] In 2020, animation studio Kurzgesagt released the app Universe in a Nutshell, which took inspiration from The Scale of ...
As such, the observed size of the universe always increases. [ 1 ] [ 3 ] Since proper distance at a given time is just comoving distance times the scale factor [ 4 ] (with comoving distance normally defined to be equal to proper distance at the present time, so a ( t 0 ) = 1 {\displaystyle a(t_{0})=1} at present), the proper distance to the ...
Cosmic Eye [1] is a short 2012/2018 film and iOS app, developed by astrophysicist Danail Obreschkow. [2] It shows the largest and smallest well known scales of the universe by gradually zooming out from and then back into the face of a woman called "Louise".
According to the theory of cosmic inflation initially introduced by Alan Guth and D. Kazanas, [23] if it is assumed that inflation began about 10 −37 seconds after the Big Bang and that the pre-inflation size of the universe was approximately equal to the speed of light times its age, that would suggest that at present the entire universe's ...
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The portion of the universe that can be seen by humans is approximately 93 billion light-years in diameter at present, but the total size of the universe is not known. [3] Some of the earliest cosmological models of the universe were developed by ancient Greek and Indian philosophers and were geocentric, placing Earth at the center.
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