The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Pluto is smaller than Russia.
9
Earth is the only planet in our solar system that's not named after a god or goddess.
17
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14