Rank #7
The universe is estimated to contain around 10^80 atoms.
This description explores the vastness of the universe and its estimated number of atoms. It is estimated that the universe contains approximately 10^80 atoms, an unfathomable number that is difficult to comprehend. This number is so large that it is impossible to count the number of atoms in the universe
From Wikipedia
The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth; the electromagnetic radiation from these astronomical objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion. The radius of this region is about 14.26 gigaparsecs (46.5 billion light-years or 4.40×1026 m).