The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
Summer on Uranus lasts for 21 years.
358
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Jupiter is bigger than all the other planets combined.
254
It 'snows' metal on Venus.
13