There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
It 'snows' metal on Venus.
13
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Some asteroids have other asteroids orbiting them.
131
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115