How big is the unknown universe?

How big is the universe?

Scale of the universe

It's one of the fundamental questions of astronomy. By looking for the farthest observable point from Earth (and by extension, the oldest given the speed of light) we can estimate a diameter. 

Thanks to evolving technology, astronomers are able to look back in time to the moments just after the Big Bang.

This might seem to imply that the entire universe lies within our view. But the size of the universe depends on a number of things, including its shape and expansion. 

As a result, while we can make estimates as to the size of the universe scientists can't put a number on it. 

Related: What is the coldest place in the universe?

The observable universe

In 2013, the European Space Agency's Planck space mission released the most accurate and detailed map ever made of the universe's oldest light.

The map revealed that the universe is 13.8 billion years old. Planck calculated the age by studying the cosmic microwave background.

"The cosmic microwave background light is a traveler from far away and

how wide is the universe

how large is our universe