The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
It takes eight and a half minutes for light to get from the sun to earth.
159
The heart of an astronaut actually gets smaller when in outer space.
216
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7