The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we ...

Let’s explore this cosmic perspective together. How big is the universe? It’s a question that stirs both wonder and humility.

Therefore, any estimate of the size of the observable universe must assume that the farthest light we see was released after that pivotal era when space became transparent.

But knowing how big the observable universe is doesn't tell us everything we know about how many atoms are in it. We also need to know how much matter, or stuff, is in it.

The limit of our vision extends more than 46 billion light years in all directions. But how big was the Universe when it was first born?

If we know how big the observable Universe is, why can't we figure out how big the unobservable part is?

But knowing how big the observable universe is doesn't tell us everything we know about how many atoms are in it. We also need to know how much matter, or stuff, is in it.

How Do We Know There Is Anything Beyond The Observable Universe? One team claims to have seen the influence of matter beyond the observable universe.

The universe is much larger than we mere mortals are capable of comprehending, but seeing images illustrating its massive size can humble each of us in a way nothing else can.

Why is the observable universe so big? Here's why the universe’s size isn’t constrained by the speed of light.