Buzz Aldrin’s mother’s maiden name was Moon.
9
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Earth is the only planet in our solar system that's not named after a god or goddess.
17