From the baffling true scale of our solar system to the unbearable vastness of the universe, this incredible interactive map reveals the true size of the cosmos.

The cosmos has been expanding since the Big Bang, but how fast? The answer could reveal whether everything we thought we knew about physics is wrong.

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 ...

The universe is a big place, but do we really know how big? Scientists think they do, and use an array of methods to figure it out. Here are our CliffNotes.

The universe is undoubtedly a big place. But just how big is it? "That may be something that we actually never know," Sarah Gallagher, an astrophysicist at Western University in Ontario, Canada ...

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.

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

Back to Article List The Big Freeze: How the universe will die The cosmos will come to a close through a cold and lonely death called the Big Freeze.