Saturday, October 26, 2013
Some number between 10^78 and 10^82
The number of atoms in the entire observable universe is estimated to be within the range of 10^78 (one quinvigintillion) to 10^82 (ten sexvigintillion). We’ve added the word ‘observable’ because we realize that there are really many things to discover about the entire universe so, basically, that range back there is only an estimate based upon what we currently know.
Now, before you go on wondering as to whether, because of the
Universe’s expansion and all, this number can be growing, note that
what’s taking place is simply a mere expansion or dispersion of the
masses that make up the Universe. That is, no amount of matter that
wasn’t there in the beginning is ever added during this expansion.