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 Big Bang marks the origin of everything,the birth of the universe 13.8 billion years ago. But what exactly happened at that moment? .Explore the creation of space, matter, and the cosmic ...

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?

The term ‘Big Bang’ might make you think of a massive explosion. Put the thought out of your head. Rather than an explosion, it was the start of everything in the universe.

The universe is vast, beyond what we can truly comprehend. But how big is it, really? In this video, we explore the incredible size of the universe, from its observable limits to the theories that ...

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. We suppose not.

When we say that the something is big—be it the visible universe or a human brain—we have to ask: Compared with what? The natural point of reference is the scope of everyday human life. This is the ...

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.

The age of the universe is determined by the expansion rate of the cosmos and the standard model of cosmology.

It's been 13.8 billion years since the Big Bang, and the Universe has been expanding the whole time. So how big was it at the moment of its birth?

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.