How Many Atoms Are There in the Known Universe?
Answer: It has been estimated that there are between 10 to the power 78 and 10 to the power 82 atoms in the known, observable universe.
This figure has the agreement of the Astronomer Royal, Martin Rees, who has stated:
In layman’s terms, that works out to between ten quadrillion vigintillion and one-hundred thousand quadrillion vigintillion atoms.
— Read on www.universetoday.com/36302/atoms-in-the-universe/
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