The population of the Earth has more than doubled since 1950.
151
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Venus is the only planet that rotates clockwise.
310
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Astronauts cannot burp in space.
232