It takes eight and a half minutes for light to get from the sun to earth.
159
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Earth is the only planet in our solar system that's not named after a god or goddess.
17
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
Some asteroids have other asteroids orbiting them.
131
Astronauts cannot burp in space.
232