The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
Pluto is smaller than Russia.
9
Sound doesn't travel in space.
255
Earth is the only planet in our solar system that's not named after a god or goddess.
17