41% of the moon is not visible from earth at any time.
103
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Lightning strikes about 6,000 times per minute on this planet!
158
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88