The Vastness of the Universe

The universe is so massive that if you traveled at the speed of light,

it would take you over 93 billion light years just to cross the observable part.

Even crazier, space is completely silent because sound needs air to travel, and there is none

out there. And here's the wildest part: there are more stars in the universe than grains

of sand on every beach on Earth combined. That's roughly 200 billion trillion stars scattered

across space, each one a sun to potential worlds we'll never see.