Big Picture

Summary: In case you hadn't noticed, I never get tired of visualizing just how big our universe is. Here's another cool walk-through.

Why it's a Mind Blow:

This is a grain of sand...

This is a million grains of sand, give or take...

This is a million people in Tahrir Square...

And this is a beach...

For every grain of sand on planet Earth's beaches, there are a million stars in the known universe.

Oh, and this is a baby pig...