Question: How big is the universe???

Hayley and the Mars Rover answered on 10 Dec 2020:

No one knows for sure, it could go on forever! It is a question that scientists are trying to find the answer too! There is something called the observable universe, the parts of the universe that scientists can see, and this is around 93 billion light years across!

We also know that the universe is expanding, it is getting bigger and bigger!