The heart of an astronaut actually gets smaller when in outer space.
216
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
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 sun puts out more power in 1 second than mankind has ever used within human existence.
14
It would take more than 150 years to drive a car to the sun.
569
Only 55% of Americans know that the sun is a star.
986
If two pieces of metal touch in space, they become permanently stuck together.
808
Mars had an oxygen-rich atmosphere around 4 billion years ago
13