4. How Big Is The Universe?
The short answer to this question is “unfathomably vast; probably infinite and ever-expanding.” Our puny little minds can’t even imagine just how enormous the universe is. That’s right; even human imagination can’t begin to operate with billions upon trillions of stars, solar systems, galaxies, nebulae, and everything in between. From our perspective, the Earth is massive, the sun is 333,000 times bigger than our planet, and the solar system spans billions of miles. Like 99.9% of all this space is cold, empty void, probably filled with anti-matter. So that’s just one solar system in a galaxy, containing over a hundred billion other stars. And there are billions of galaxies out there flying through the fabric of the universe at neck-breaking speeds. Here’s a cool number for you: 93 billion light-years. That’s the supposed diameter of our visible universe. Who knows what lies beyond that?
