# How big is the Universe in total?

## How big is the Universe in total?

around 92 billion light-years
If inflation occurred at a constant rate through the life of the universe, that same spot is 46 billion light-years away today according to Ethan Siegel, writing for Forbes, making the diameter of the observable universe a sphere around 92 billion light-years.

### What is the maximum size of the Universe?

13.8 billion years after the Big Bang, it’s now 46.1 billion light years in radius. That’s the limit of what’s observable. Any farther than that, and even something moving at the speed of light since the moment of the hot Big Bang will not have had sufficient time to reach us.

How big is Earth vs universe?

It has an estimated 350-billion large galaxies (like the Milky way). It houses about 30-billion-trillion stars; that is 30,000,000,000,000,000,000,000 stars! The Earth is about 3.5 million times larger than a human. The Solar System is about 36 billion times larger than Earth (3.6 X 10^10).

Is there just one universe?

There is not one universe—there is a multiverse. In Scientific American articles and books such as Brian Greene’s The Hidden Reality, leading scientists have spoken of a super-Copernican revolution.

## What is on the other side of the universe?

The universe is infinite, so it cannot (by definition) expand into anything and there is nothing on the other side.

### How many universes are in the world?

If we define “universe” as “all there is” or “all that exists,” then obviously, by definition, there can be only one universe. But if we define “universe” as “all we can ever see” (no matter how large our telescopes) or “space-time regions that expand together,” then many universes may indeed exist.

How many Earths could fit in the universe?

By dividing the two volumes we get a factor of 3.2⋅1059, or written as decimal number: The observable comoving volume of the universe is about 320,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000-times the volume of Earth.

How big is the universe?

So how big is the universe? No one knows if the universe is infinitely large, or even if ours is the only universe that exists. And other parts of the universe, very far away, might be quite different from the universe closer to home. Future NASA missions will continue to search for clues to the ultimate size and scale of our cosmic home.

## How far away was the Big Bang from Earth?

Thus, while scientists might see a spot that lay 13.8 billion light-years from Earth at the time of the Big Bang, the universe has continued to expand over its lifetime.

### How far away can we look in space?

Because of the connection between distance and the speed of light, this means scientists can look at a region of space that lies 13.8 billion light-years away.

What is the radius of the universe?

That the universe dates back 13.7 billion years. Its radius, then, is the distance a beam of light would have traveled in that time 13.7 billion light years. That works out to about 1.3 quadrillion kilometers. In fact, it’s even bigger…. Much bigger. How it got so large, so fast, was until recently a deep mystery.