how fast is the universe expanding

Question

I know that the universe is 13 billion years old and the fastest anything could be is the speed of light so if the universe is expanding as fast as it could be wouldn’t the universe be 13 billion light years big? But I’ve searched and it’s 93 billion light years big, so is the universe expanding faster than the speed of light?

In: 938

Answer 1

Note, a competing theory exists and is gaining traction that assumes the expansion is happening along side photon decay, meaning the universe is 2x older than we initially thought and the expansion is massively slower than estimated.