Jessica

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Where's the edge of the universe?

We all know that the universe is expanding, right? Well, if you weren't aware, now you are. We live in an expanding universe: Every galaxy is flying away from every other galaxy. This naturally leads to a common question: If the universe is expanding, what's it expanding <i>into</i>? More universe? …

WATCH: Why The Solar System Is Almost Entirely Flat

We don't need all that 3D space.<p>About 4.6 billion years ago, a nebulous cloud of swirling dust and gas came together in very important ways, thanks …

Universe

FYI: Where Is The Center of the Universe?

First, it's important to know that the big bang wasn't an explosion of matter into empty space—it was the rapid expansion of space itself. This means that every single point in the universe appears to be at the center. Think of the universe as an empty balloon with dots on it. Those dots represent …