The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
41% of the moon is not visible from earth at any time.
103
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
Pluto is smaller than Russia.
9