The heart of an astronaut actually gets smaller when in outer space.
216
The light hitting the earth right now is 30 thousand years old.
163
The earth travels through space at 660,000 miles per hour.
189
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Earth is the only planet in our solar system that's not named after a god or goddess.
17
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
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219