There are more possible chess games than atoms in the observable universe — about 10^120 vs 10^80

There are more possible arrangements of a deck of cards than atoms on Earth — 52! ≈ 8 × 10^67

Card arrangements vastly exceed Earth's atoms: 52! ≈ 8 × 10^67

Pi has been calculated to over 100 trillion digits — but 39 digits is enough to measure the observable universe to the width of a hydrogen atom

Pi's 39-digit approximation measures universe's width to hydrogen atom's size

What is the estimated number of galaxies in the observable universe, and what factors contribute to the uncertainty in this estimation?

Approximately 2 trillion galaxies, with uncertainty due to observational limits and cosmic variance

The observable universe is about 93 billion light-years in diameter

The observable universe spans approximately 93 billion light-years across

Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons

A teaspoon of neutron star matter equals approximately 6 billion tons

A prime number cannot be divided evenly by any number except 1 and itself — the largest known has 24 million digits

Prime numbers are indivisible by any number other than 1 and themselves, with the largest known having 24 million digits