If the universe is 13.8 billion years old, how is the observable universe 46.5 billion light years across?

Question

If the universe is 13.8 billion years old, how is the observable universe 46.5 billion light years across?

In: Physics

Answer 1

The Universe is expanding, it’s been expanding for billions of years at about this rate. Across the visible Universe, the edges are expanding at a speed greater than the speed of light.