If you could take all the empty space out of your atoms, the entire human race would be sugar-cube sized!

Atoms have a ton of empty space in them. Many drawings of atoms are highly inaccurate because they don’t account for all the empty space in an atom. The empty space covers the majority of the size of an atom with just a small nucleus and some electrons moving around the mostly empty space. 

If an atom is the whole solar system, the sun would be the nucleus and the planets would be the electrons. In between the planets and sun, there is a ton of empty space! 

Here are some other crazy facts about the universe: 

• If the sun were made up of bananas it wouldn’t be all that different. It would still be extremely hot! The reason for the heat of the sun has to do with its mass more so than its material. Therefore, the sun could be made up of many different substances, like, for example, bananas. 
• 98% of the universe is invisible! What this means is that the majority of the universe is made up of dark matter, which we know exists because of the effect its gravity has on visible matter. 

(Source)