Cosmological horizon
Horizon appearing on a cosmological scale / From Wikipedia, the free encyclopedia
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Not to be confused with Particle horizon.
A cosmological horizon is a measure of the distance from which one could possibly retrieve information.[1] This observable constraint is due to various properties of general relativity, the expanding universe, and the physics of Big Bang cosmology. Cosmological horizons set the size and scale of the observable universe. This article explains a number of these horizons.