How Big is Space? We Asked a NASA Expert

How Big is Space? We Asked a NASA Expert

How big is space? It’s one of the most mind-bending questions we can ask because the deeper we look, the more the universe keeps going. We’ve measured billions of light-years in every direction and still haven’t reached the edge. A NASA scientists explains what we know — and don’t know — about the size of the cosmos. Explore more about the universe: https://science.nasa.gov/exoplanets/what-is-the-universe/ Credit: NASA Credit to : NASA