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

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

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

Your DNA stretched end to end would reach the Sun and back over 600 times

Human DNA length: 2 meters, Sun-Earth distance: 150 million km, repetitions: 900,000,000

What the CMB power spectrum tells us — the age, composition, and geometry of the universe

CMB power spectrum reveals universe's age, composition, and large-scale structure

Light from the Sun takes 8 minutes and 20 seconds to reach Earth

Sunlight travels approximately 149.6 million kilometers to Earth in 8 minutes and 20 seconds

Sharks are older than trees — sharks appeared about 400 million years ago, trees about 350 million

Sharks existed approximately 400 million years ago, predating trees by 50 million years