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Scientists can not even begin to estimate the size of the universe just before the Big Bang. The Big Bang destroyed all information about what existed before it occurred. Scientists have attempted to discover the size of the universe at the time of the Big Bang. The closest they can get by extrapolation is ten with an exponent of minus 32 of a second afterward. The guesses range from the size of a man's hand to a single point. No one understands what caused it. The secret may lie in two sets of equations, one involves the Theory of Relativity and the other involves quantum physics. So far no one has resolved the conflict between the two. If you can, maybe you will figure it out.

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16y ago

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How many particles are estimated to exist in the universe?

There are estimated to be around 1080 particles in the universe.


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The visible universe is estimated to contain between 1078 and 1080 atoms.(One estimate at the higher end of the range is 4 x 1079.)This is the estimated number of atoms in the observableuniverse, but since we do not know the absolute size of the universe, we cannot be certain.(Most of the matter in the universe is still hydrogen.)


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The universe has been continuously growing since the Big Bang, and there is no way to accurately measure it, so no. Comments: In fact astronomers have estimated the size of the "Observable Universe". They say there's probably a lot more that we can't see. The Universe is about 13.8 billion years old. That gives the maximum distance we can observe as 13.8 billion light years. But while the light from the "edge" of the Observable Universe has been travelling to us, the Universe has been expanding. Astronomers have estimated how far away that edge is NOW. The usual estimate given for the "real" radius of the Observable Universe is about 46 billion light years.


What is the estimated size of the observable universe radius?

Oh, that's a magical question, isn't it? The estimated radius of the observable universe is about 46.5 billion light-years. It's quite a wondrous thought to imagine just how vast and colorful our universe truly is.


Why is the age of the universe estimated to be 13.5 Billon years?

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The universe is estimated to be around 13.8 billion years old in 2023.