A comet's tail always points away from the sun.
2
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
41% of the moon is not visible from earth at any time.
103
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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82