- published: 09 Sep 2012
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In Big Bang cosmology, the observable universe consists of the galaxies and other matter that humans can in principle observe from Earth in the present day, because light (or other signals) from those objects has had time to reach us since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction—that is, the observable universe is a spherical volume (a ball) centered on the observer, regardless of the shape of the universe as a whole. Every location in the universe has its own observable universe which may or may not overlap with the one centered on the Earth.
The Observable Universe (accurately scaled zoom out from Earth)
Misconceptions About the Universe
What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios
How Big is the Universe?
Radius of Observable Universe
The Known Universe - simulation of the visible universe based on real data
The Observable Universe
The Observable Universe
Introductory Astronomy: Observable Universe vs. Entire Universe
The Known Universe by AMNH
These are all the known galaxies in the observable universe
observable universe
How Do You Measure the Size of the Universe? | Space Time | PBS Digital Studios
What is The Universe and Observable Universe