Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Pluto is smaller than Russia.
9
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Venus is the only planet that rotates clockwise.
310
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
Only 55% of Americans know that the sun is a star.
986
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
A 100-pound person on Earth would weigh 38 pounds on Mars.
102