Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It would take more than 150 years to drive a car to the sun.
569
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
It takes eight and a half minutes for light to get from the sun to earth.
159
Pluto is smaller than Russia.
9
Buzz Aldrin’s mother’s maiden name was Moon.
9
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219