One of the problems with understanding the size of the universe and everything in it, is it’s size. The famous 1977 film ‘Powers of Ten’ by Charles and Ray Eames first tackled this first (see below).
httpv://www.youtube.com/watch?v=0fKBhvDjuy0
In 2012, Cary & Michael Huang created a modern version of the classic video Powers of Ten through a Flash animation – which covers both the large and small in our universe. Go here to access the highly recommended animation.