How big is the universe? Based on what we can observe, the universe appears to be almost 28 billion light-years across. However, it is far larger than that.

How does Pluto’s distance help us understand the size of the universe To understand just how enormous space is, let's begin with an analogy that's close to home — a road trip.

If the universe is infinite in size, you don't really need to worry about this conundrum. The universe, being all there is, is infinitely big and has no edge, so there's no outside to even talk about.

Let’s explore this cosmic perspective together. How big is the universe? It’s a question that stirs both wonder and humility. The observable universe stretches 93 billion light years across ...

So how big is the universe in the inflation model? It begs the question of what is going on at the boundaries and whether information could be communicated across universes.

This cosmic explosion rippled through space-time. Finding more like it could solve mysteries such as the reason behind the universe's expansion.

Nothing in the Universe can travel faster than the speed of light. So how does space itself do it?

So to weigh the Universe, all you have to do is calculate how big those oscillating regions must have been, see how big they actually look in the microwave background, and work out how much matter ...

But the world’s most powerful complex space observatory will answer questions about our solar system, study exoplanets in new ways and look deeper into the universe than we’ve ever been able to.

From the moment of the Big Bang, everything in the universe has kept moving, but why is that? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Dark energy means that the Universe's expansion is accelerating. But how big will it get, and how fast?