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

There are more stars in the universe than grains of sand on all of Earth's beaches

Stars vastly outnumber Earth's sand grains

The Sun makes up 99.86% of all mass in the solar system

The Sun constitutes 99.86% of the solar system's total mass

A single teaspoon of soil contains more microorganisms than people on Earth

"One teaspoon of soil hosts more microbes than Earth's human population."

Saturn would float in water — its density is lower than water's

Saturn's average density is less than water's, causing it to float

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

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

The observable universe spans approximately 93 billion light-years across