## What does it mean if the universe is infinite?

It means **space never ends**. It’s a matrix of limitless galaxies, stars, planets, and energy. California Institute of Technology theoretical physicist Sean Carroll cautiously noted last spring that while a finite universe would be provable, scientists can never prove infinity.

## How do we know the universe is infinite?

**An infinite universe could have a geometry that is totally flat like a piece of paper**. Such a universe would go on forever and include every possibility — including endless versions of ourselves. On the other hand, a donut-shaped universe would have to be finite, as it’s closed.

## How can the universe expand if its infinite?

So essentially, if the universe is of infinite magnitude, **it cannot possibly be expanding into anything**. Rather, it’s stretching (it’s a fine distinction, but an important one). Simply put, every region of the universe, every distance between every pair of galaxies, is being “stretched,” pulled apart like taffy.

## Is the past infinite?

Each year is separated from any other by a finite number of years (remember that there’s no first year). There never was a time when the past became infinite because no set can become infinite by adding any finite number of members. So, **if the past is infinite, then it has always been infinite**.

## Is there a number bigger than infinity?

The concept of infinity varies accordingly. Mathematically, if we see infinity is the unimaginable end of the number line. As no number is imagined beyond it(**no real number is larger than infinity**).