How big is the universe - no-one really knows since we can only see so far with our current mode of technology. Explorers have looked deeper and deeper into the vast expanse of the universe. We know that universe is expanding and with our current frame of knowledge scientists tell us that it is a pretty big place
To even start to comprehend the size of the universe watch this video
So, the universe is a really, really big place. It is hard to even come close to understanding the size of this incredible mysterious universe we live in
Here is another video showing the scales of the planets making us realize how small the Earth really is and how big the universe is.