41% of the moon is not visible from earth at any time.
103
It would take more than 150 years to drive a car to the sun.
569
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
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Earth gets 100 tons heavier every day due to falling space dust.
673
Only 55% of Americans know that the sun is a star.
986
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Lightning strikes about 6,000 times per minute on this planet!
158